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writeback: split writeback_inodes_wb
[linux-2.6/next.git] / net / core / pktgen.c
blob1dacd7ba8dbb1d4c2e5e6e9f623b3806e202f0ee
1 /*
2 * Authors:
3 * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
4 * Uppsala University and
5 * Swedish University of Agricultural Sciences
6 *
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
8 * Ben Greear <greearb@candelatech.com>
9 * Jens Låås <jens.laas@data.slu.se>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
15 *
16 *
17 * A tool for loading the network with preconfigurated packets.
18 * The tool is implemented as a linux module. Parameters are output
19 * device, delay (to hard_xmit), number of packets, and whether
20 * to use multiple SKBs or just the same one.
21 * pktgen uses the installed interface's output routine.
22 *
23 * Additional hacking by:
24 *
25 * Jens.Laas@data.slu.se
26 * Improved by ANK. 010120.
27 * Improved by ANK even more. 010212.
28 * MAC address typo fixed. 010417 --ro
29 * Integrated. 020301 --DaveM
30 * Added multiskb option 020301 --DaveM
31 * Scaling of results. 020417--sigurdur@linpro.no
32 * Significant re-work of the module:
33 * * Convert to threaded model to more efficiently be able to transmit
34 * and receive on multiple interfaces at once.
35 * * Converted many counters to __u64 to allow longer runs.
36 * * Allow configuration of ranges, like min/max IP address, MACs,
37 * and UDP-ports, for both source and destination, and can
38 * set to use a random distribution or sequentially walk the range.
39 * * Can now change most values after starting.
40 * * Place 12-byte packet in UDP payload with magic number,
41 * sequence number, and timestamp.
42 * * Add receiver code that detects dropped pkts, re-ordered pkts, and
43 * latencies (with micro-second) precision.
44 * * Add IOCTL interface to easily get counters & configuration.
45 * --Ben Greear <greearb@candelatech.com>
46 *
47 * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
48 * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
49 * as a "fastpath" with a configurable number of clones after alloc's.
50 * clone_skb=0 means all packets are allocated this also means ranges time
51 * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
52 * clones.
53 *
54 * Also moved to /proc/net/pktgen/
55 * --ro
56 *
57 * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
58 * mistakes. Also merged in DaveM's patch in the -pre6 patch.
59 * --Ben Greear <greearb@candelatech.com>
60 *
61 * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
62 *
63 *
64 * 021124 Finished major redesign and rewrite for new functionality.
65 * See Documentation/networking/pktgen.txt for how to use this.
66 *
67 * The new operation:
68 * For each CPU one thread/process is created at start. This process checks
69 * for running devices in the if_list and sends packets until count is 0 it
70 * also the thread checks the thread->control which is used for inter-process
71 * communication. controlling process "posts" operations to the threads this
72 * way. The if_lock should be possible to remove when add/rem_device is merged
73 * into this too.
74 *
75 * By design there should only be *one* "controlling" process. In practice
76 * multiple write accesses gives unpredictable result. Understood by "write"
77 * to /proc gives result code thats should be read be the "writer".
78 * For practical use this should be no problem.
79 *
80 * Note when adding devices to a specific CPU there good idea to also assign
81 * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
82 * --ro
83 *
84 * Fix refcount off by one if first packet fails, potential null deref,
85 * memleak 030710- KJP
86 *
87 * First "ranges" functionality for ipv6 030726 --ro
88 *
89 * Included flow support. 030802 ANK.
90 *
91 * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
92 *
93 * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
94 * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
95 *
96 * New xmit() return, do_div and misc clean up by Stephen Hemminger
97 * <shemminger@osdl.org> 040923
98 *
99 * Randy Dunlap fixed u64 printk compiler waring
100 *
101 * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
102 * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
103 *
104 * Corrections from Nikolai Malykh (nmalykh@bilim.com)
105 * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
106 *
107 * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
108 * 050103
109 *
110 * MPLS support by Steven Whitehouse <steve@chygwyn.com>
111 *
112 * 802.1Q/Q-in-Q support by Francesco Fondelli (FF) <francesco.fondelli@gmail.com>
113 *
114 * Fixed src_mac command to set source mac of packet to value specified in
115 * command by Adit Ranadive <adit.262@gmail.com>
116 *
117 */
118 #include <linux/sys.h>
119 #include <linux/types.h>
120 #include <linux/module.h>
121 #include <linux/moduleparam.h>
122 #include <linux/kernel.h>
123 #include <linux/mutex.h>
124 #include <linux/sched.h>
125 #include <linux/slab.h>
126 #include <linux/vmalloc.h>
127 #include <linux/unistd.h>
128 #include <linux/string.h>
129 #include <linux/ptrace.h>
130 #include <linux/errno.h>
131 #include <linux/ioport.h>
132 #include <linux/interrupt.h>
133 #include <linux/capability.h>
134 #include <linux/hrtimer.h>
135 #include <linux/freezer.h>
136 #include <linux/delay.h>
137 #include <linux/timer.h>
138 #include <linux/list.h>
139 #include <linux/init.h>
140 #include <linux/skbuff.h>
141 #include <linux/netdevice.h>
142 #include <linux/inet.h>
143 #include <linux/inetdevice.h>
144 #include <linux/rtnetlink.h>
145 #include <linux/if_arp.h>
146 #include <linux/if_vlan.h>
147 #include <linux/in.h>
148 #include <linux/ip.h>
149 #include <linux/ipv6.h>
150 #include <linux/udp.h>
151 #include <linux/proc_fs.h>
152 #include <linux/seq_file.h>
153 #include <linux/wait.h>
154 #include <linux/etherdevice.h>
155 #include <linux/kthread.h>
156 #include <net/net_namespace.h>
157 #include <net/checksum.h>
158 #include <net/ipv6.h>
159 #include <net/addrconf.h>
160 #ifdef CONFIG_XFRM
161 #include <net/xfrm.h>
162 #endif
163 #include <asm/byteorder.h>
164 #include <linux/rcupdate.h>
165 #include <linux/bitops.h>
166 #include <linux/io.h>
167 #include <linux/timex.h>
168 #include <linux/uaccess.h>
169 #include <asm/dma.h>
170 #include <asm/div64.h> /* do_div */
171
172 #define VERSION "2.73"
173 #define IP_NAME_SZ 32
174 #define MAX_MPLS_LABELS 16 /* This is the max label stack depth */
175 #define MPLS_STACK_BOTTOM htonl(0x00000100)
176
177 /* Device flag bits */
178 #define F_IPSRC_RND (1<<0) /* IP-Src Random */
179 #define F_IPDST_RND (1<<1) /* IP-Dst Random */
180 #define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
181 #define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
182 #define F_MACSRC_RND (1<<4) /* MAC-Src Random */
183 #define F_MACDST_RND (1<<5) /* MAC-Dst Random */
184 #define F_TXSIZE_RND (1<<6) /* Transmit size is random */
185 #define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
186 #define F_MPLS_RND (1<<8) /* Random MPLS labels */
187 #define F_VID_RND (1<<9) /* Random VLAN ID */
188 #define F_SVID_RND (1<<10) /* Random SVLAN ID */
189 #define F_FLOW_SEQ (1<<11) /* Sequential flows */
190 #define F_IPSEC_ON (1<<12) /* ipsec on for flows */
191 #define F_QUEUE_MAP_RND (1<<13) /* queue map Random */
192 #define F_QUEUE_MAP_CPU (1<<14) /* queue map mirrors smp_processor_id() */
193 #define F_NODE (1<<15) /* Node memory alloc*/
194
195 /* Thread control flag bits */
196 #define T_STOP (1<<0) /* Stop run */
197 #define T_RUN (1<<1) /* Start run */
198 #define T_REMDEVALL (1<<2) /* Remove all devs */
199 #define T_REMDEV (1<<3) /* Remove one dev */
200
201 /* If lock -- can be removed after some work */
202 #define if_lock(t) spin_lock(&(t->if_lock));
203 #define if_unlock(t) spin_unlock(&(t->if_lock));
204
205 /* Used to help with determining the pkts on receive */
206 #define PKTGEN_MAGIC 0xbe9be955
207 #define PG_PROC_DIR "pktgen"
208 #define PGCTRL "pgctrl"
209 static struct proc_dir_entry *pg_proc_dir;
210
211 #define MAX_CFLOWS 65536
212
213 #define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
214 #define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
215
216 struct flow_state {
217 __be32 cur_daddr;
218 int count;
219 #ifdef CONFIG_XFRM
220 struct xfrm_state *x;
221 #endif
222 __u32 flags;
223 };
224
225 /* flow flag bits */
226 #define F_INIT (1<<0) /* flow has been initialized */
227
228 struct pktgen_dev {
229 /*
230 * Try to keep frequent/infrequent used vars. separated.
231 */
232 struct proc_dir_entry *entry; /* proc file */
233 struct pktgen_thread *pg_thread;/* the owner */
234 struct list_head list; /* chaining in the thread's run-queue */
235
236 int running; /* if false, the test will stop */
237
238 /* If min != max, then we will either do a linear iteration, or
239 * we will do a random selection from within the range.
240 */
241 __u32 flags;
242 int removal_mark; /* non-zero => the device is marked for
243 * removal by worker thread */
244
245 int min_pkt_size; /* = ETH_ZLEN; */
246 int max_pkt_size; /* = ETH_ZLEN; */
247 int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
248 int nfrags;
249 u64 delay; /* nano-seconds */
250
251 __u64 count; /* Default No packets to send */
252 __u64 sofar; /* How many pkts we've sent so far */
253 __u64 tx_bytes; /* How many bytes we've transmitted */
254 __u64 errors; /* Errors when trying to transmit, */
255
256 /* runtime counters relating to clone_skb */
257
258 __u64 allocated_skbs;
259 __u32 clone_count;
260 int last_ok; /* Was last skb sent?
261 * Or a failed transmit of some sort?
262 * This will keep sequence numbers in order
263 */
264 ktime_t next_tx;
265 ktime_t started_at;
266 ktime_t stopped_at;
267 u64 idle_acc; /* nano-seconds */
268
269 __u32 seq_num;
270
271 int clone_skb; /*
272 * Use multiple SKBs during packet gen.
273 * If this number is greater than 1, then
274 * that many copies of the same packet will be
275 * sent before a new packet is allocated.
276 * If you want to send 1024 identical packets
277 * before creating a new packet,
278 * set clone_skb to 1024.
279 */
280
281 char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
282 char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
283 char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
284 char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
285
286 struct in6_addr in6_saddr;
287 struct in6_addr in6_daddr;
288 struct in6_addr cur_in6_daddr;
289 struct in6_addr cur_in6_saddr;
290 /* For ranges */
291 struct in6_addr min_in6_daddr;
292 struct in6_addr max_in6_daddr;
293 struct in6_addr min_in6_saddr;
294 struct in6_addr max_in6_saddr;
295
296 /* If we're doing ranges, random or incremental, then this
297 * defines the min/max for those ranges.
298 */
299 __be32 saddr_min; /* inclusive, source IP address */
300 __be32 saddr_max; /* exclusive, source IP address */
301 __be32 daddr_min; /* inclusive, dest IP address */
302 __be32 daddr_max; /* exclusive, dest IP address */
303
304 __u16 udp_src_min; /* inclusive, source UDP port */
305 __u16 udp_src_max; /* exclusive, source UDP port */
306 __u16 udp_dst_min; /* inclusive, dest UDP port */
307 __u16 udp_dst_max; /* exclusive, dest UDP port */
308
309 /* DSCP + ECN */
310 __u8 tos; /* six MSB of (former) IPv4 TOS
311 are for dscp codepoint */
312 __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
313 (see RFC 3260, sec. 4) */
314
315 /* MPLS */
316 unsigned nr_labels; /* Depth of stack, 0 = no MPLS */
317 __be32 labels[MAX_MPLS_LABELS];
318
319 /* VLAN/SVLAN (802.1Q/Q-in-Q) */
320 __u8 vlan_p;
321 __u8 vlan_cfi;
322 __u16 vlan_id; /* 0xffff means no vlan tag */
323
324 __u8 svlan_p;
325 __u8 svlan_cfi;
326 __u16 svlan_id; /* 0xffff means no svlan tag */
327
328 __u32 src_mac_count; /* How many MACs to iterate through */
329 __u32 dst_mac_count; /* How many MACs to iterate through */
330
331 unsigned char dst_mac[ETH_ALEN];
332 unsigned char src_mac[ETH_ALEN];
333
334 __u32 cur_dst_mac_offset;
335 __u32 cur_src_mac_offset;
336 __be32 cur_saddr;
337 __be32 cur_daddr;
338 __u16 ip_id;
339 __u16 cur_udp_dst;
340 __u16 cur_udp_src;
341 __u16 cur_queue_map;
342 __u32 cur_pkt_size;
343 __u32 last_pkt_size;
344
345 __u8 hh[14];
346 /* = {
347 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
348
349 We fill in SRC address later
350 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
351 0x08, 0x00
352 };
353 */
354 __u16 pad; /* pad out the hh struct to an even 16 bytes */
355
356 struct sk_buff *skb; /* skb we are to transmit next, used for when we
357 * are transmitting the same one multiple times
358 */
359 struct net_device *odev; /* The out-going device.
360 * Note that the device should have it's
361 * pg_info pointer pointing back to this
362 * device.
363 * Set when the user specifies the out-going
364 * device name (not when the inject is
365 * started as it used to do.)
366 */
367 char odevname[32];
368 struct flow_state *flows;
369 unsigned cflows; /* Concurrent flows (config) */
370 unsigned lflow; /* Flow length (config) */
371 unsigned nflows; /* accumulated flows (stats) */
372 unsigned curfl; /* current sequenced flow (state)*/
373
374 u16 queue_map_min;
375 u16 queue_map_max;
376 int node; /* Memory node */
377
378 #ifdef CONFIG_XFRM
379 __u8 ipsmode; /* IPSEC mode (config) */
380 __u8 ipsproto; /* IPSEC type (config) */
381 #endif
382 char result[512];
383 };
384
385 struct pktgen_hdr {
386 __be32 pgh_magic;
387 __be32 seq_num;
388 __be32 tv_sec;
389 __be32 tv_usec;
390 };
391
392 struct pktgen_thread {
393 spinlock_t if_lock; /* for list of devices */
394 struct list_head if_list; /* All device here */
395 struct list_head th_list;
396 struct task_struct *tsk;
397 char result[512];
398
399 /* Field for thread to receive "posted" events terminate,
400 stop ifs etc. */
401
402 u32 control;
403 int cpu;
404
405 wait_queue_head_t queue;
406 struct completion start_done;
407 };
408
409 #define REMOVE 1
410 #define FIND 0
411
412 static inline ktime_t ktime_now(void)
413 {
414 struct timespec ts;
415 ktime_get_ts(&ts);
416
417 return timespec_to_ktime(ts);
418 }
419
420 /* This works even if 32 bit because of careful byte order choice */
421 static inline int ktime_lt(const ktime_t cmp1, const ktime_t cmp2)
422 {
423 return cmp1.tv64 < cmp2.tv64;
424 }
425
426 static const char version[] =
427 "pktgen " VERSION ": Packet Generator for packet performance testing.\n";
428
429 static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *i);
430 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname);
431 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
432 const char *ifname, bool exact);
433 static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
434 static void pktgen_run_all_threads(void);
435 static void pktgen_reset_all_threads(void);
436 static void pktgen_stop_all_threads_ifs(void);
437
438 static void pktgen_stop(struct pktgen_thread *t);
439 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
440
441 static unsigned int scan_ip6(const char *s, char ip[16]);
442 static unsigned int fmt_ip6(char *s, const char ip[16]);
443
444 /* Module parameters, defaults. */
445 static int pg_count_d __read_mostly = 1000;
446 static int pg_delay_d __read_mostly;
447 static int pg_clone_skb_d __read_mostly;
448 static int debug __read_mostly;
449
450 static DEFINE_MUTEX(pktgen_thread_lock);
451 static LIST_HEAD(pktgen_threads);
452
453 static struct notifier_block pktgen_notifier_block = {
454 .notifier_call = pktgen_device_event,
455 };
456
457 /*
458 * /proc handling functions
459 *
460 */
461
462 static int pgctrl_show(struct seq_file *seq, void *v)
463 {
464 seq_puts(seq, version);
465 return 0;
466 }
467
468 static ssize_t pgctrl_write(struct file *file, const char __user *buf,
469 size_t count, loff_t *ppos)
470 {
471 int err = 0;
472 char data[128];
473
474 if (!capable(CAP_NET_ADMIN)) {
475 err = -EPERM;
476 goto out;
477 }
478
479 if (count > sizeof(data))
480 count = sizeof(data);
481
482 if (copy_from_user(data, buf, count)) {
483 err = -EFAULT;
484 goto out;
485 }
486 data[count - 1] = 0; /* Make string */
487
488 if (!strcmp(data, "stop"))
489 pktgen_stop_all_threads_ifs();
490
491 else if (!strcmp(data, "start"))
492 pktgen_run_all_threads();
493
494 else if (!strcmp(data, "reset"))
495 pktgen_reset_all_threads();
496
497 else
498 printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
499
500 err = count;
501
502 out:
503 return err;
504 }
505
506 static int pgctrl_open(struct inode *inode, struct file *file)
507 {
508 return single_open(file, pgctrl_show, PDE(inode)->data);
509 }
510
511 static const struct file_operations pktgen_fops = {
512 .owner = THIS_MODULE,
513 .open = pgctrl_open,
514 .read = seq_read,
515 .llseek = seq_lseek,
516 .write = pgctrl_write,
517 .release = single_release,
518 };
519
520 static int pktgen_if_show(struct seq_file *seq, void *v)
521 {
522 const struct pktgen_dev *pkt_dev = seq->private;
523 ktime_t stopped;
524 u64 idle;
525
526 seq_printf(seq,
527 "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
528 (unsigned long long)pkt_dev->count, pkt_dev->min_pkt_size,
529 pkt_dev->max_pkt_size);
530
531 seq_printf(seq,
532 " frags: %d delay: %llu clone_skb: %d ifname: %s\n",
533 pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
534 pkt_dev->clone_skb, pkt_dev->odevname);
535
536 seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
537 pkt_dev->lflow);
538
539 seq_printf(seq,
540 " queue_map_min: %u queue_map_max: %u\n",
541 pkt_dev->queue_map_min,
542 pkt_dev->queue_map_max);
543
544 if (pkt_dev->flags & F_IPV6) {
545 char b1[128], b2[128], b3[128];
546 fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
547 fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
548 fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
549 seq_printf(seq,
550 " saddr: %s min_saddr: %s max_saddr: %s\n", b1,
551 b2, b3);
552
553 fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
554 fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
555 fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
556 seq_printf(seq,
557 " daddr: %s min_daddr: %s max_daddr: %s\n", b1,
558 b2, b3);
559
560 } else {
561 seq_printf(seq,
562 " dst_min: %s dst_max: %s\n",
563 pkt_dev->dst_min, pkt_dev->dst_max);
564 seq_printf(seq,
565 " src_min: %s src_max: %s\n",
566 pkt_dev->src_min, pkt_dev->src_max);
567 }
568
569 seq_puts(seq, " src_mac: ");
570
571 seq_printf(seq, "%pM ",
572 is_zero_ether_addr(pkt_dev->src_mac) ?
573 pkt_dev->odev->dev_addr : pkt_dev->src_mac);
574
575 seq_printf(seq, "dst_mac: ");
576 seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
577
578 seq_printf(seq,
579 " udp_src_min: %d udp_src_max: %d"
580 " udp_dst_min: %d udp_dst_max: %d\n",
581 pkt_dev->udp_src_min, pkt_dev->udp_src_max,
582 pkt_dev->udp_dst_min, pkt_dev->udp_dst_max);
583
584 seq_printf(seq,
585 " src_mac_count: %d dst_mac_count: %d\n",
586 pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
587
588 if (pkt_dev->nr_labels) {
589 unsigned i;
590 seq_printf(seq, " mpls: ");
591 for (i = 0; i < pkt_dev->nr_labels; i++)
592 seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
593 i == pkt_dev->nr_labels-1 ? "\n" : ", ");
594 }
595
596 if (pkt_dev->vlan_id != 0xffff)
597 seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
598 pkt_dev->vlan_id, pkt_dev->vlan_p,
599 pkt_dev->vlan_cfi);
600
601 if (pkt_dev->svlan_id != 0xffff)
602 seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
603 pkt_dev->svlan_id, pkt_dev->svlan_p,
604 pkt_dev->svlan_cfi);
605
606 if (pkt_dev->tos)
607 seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
608
609 if (pkt_dev->traffic_class)
610 seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
611
612 if (pkt_dev->node >= 0)
613 seq_printf(seq, " node: %d\n", pkt_dev->node);
614
615 seq_printf(seq, " Flags: ");
616
617 if (pkt_dev->flags & F_IPV6)
618 seq_printf(seq, "IPV6 ");
619
620 if (pkt_dev->flags & F_IPSRC_RND)
621 seq_printf(seq, "IPSRC_RND ");
622
623 if (pkt_dev->flags & F_IPDST_RND)
624 seq_printf(seq, "IPDST_RND ");
625
626 if (pkt_dev->flags & F_TXSIZE_RND)
627 seq_printf(seq, "TXSIZE_RND ");
628
629 if (pkt_dev->flags & F_UDPSRC_RND)
630 seq_printf(seq, "UDPSRC_RND ");
631
632 if (pkt_dev->flags & F_UDPDST_RND)
633 seq_printf(seq, "UDPDST_RND ");
634
635 if (pkt_dev->flags & F_MPLS_RND)
636 seq_printf(seq, "MPLS_RND ");
637
638 if (pkt_dev->flags & F_QUEUE_MAP_RND)
639 seq_printf(seq, "QUEUE_MAP_RND ");
640
641 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
642 seq_printf(seq, "QUEUE_MAP_CPU ");
643
644 if (pkt_dev->cflows) {
645 if (pkt_dev->flags & F_FLOW_SEQ)
646 seq_printf(seq, "FLOW_SEQ "); /*in sequence flows*/
647 else
648 seq_printf(seq, "FLOW_RND ");
649 }
650
651 #ifdef CONFIG_XFRM
652 if (pkt_dev->flags & F_IPSEC_ON)
653 seq_printf(seq, "IPSEC ");
654 #endif
655
656 if (pkt_dev->flags & F_MACSRC_RND)
657 seq_printf(seq, "MACSRC_RND ");
658
659 if (pkt_dev->flags & F_MACDST_RND)
660 seq_printf(seq, "MACDST_RND ");
661
662 if (pkt_dev->flags & F_VID_RND)
663 seq_printf(seq, "VID_RND ");
664
665 if (pkt_dev->flags & F_SVID_RND)
666 seq_printf(seq, "SVID_RND ");
667
668 if (pkt_dev->flags & F_NODE)
669 seq_printf(seq, "NODE_ALLOC ");
670
671 seq_puts(seq, "\n");
672
673 /* not really stopped, more like last-running-at */
674 stopped = pkt_dev->running ? ktime_now() : pkt_dev->stopped_at;
675 idle = pkt_dev->idle_acc;
676 do_div(idle, NSEC_PER_USEC);
677
678 seq_printf(seq,
679 "Current:\n pkts-sofar: %llu errors: %llu\n",
680 (unsigned long long)pkt_dev->sofar,
681 (unsigned long long)pkt_dev->errors);
682
683 seq_printf(seq,
684 " started: %lluus stopped: %lluus idle: %lluus\n",
685 (unsigned long long) ktime_to_us(pkt_dev->started_at),
686 (unsigned long long) ktime_to_us(stopped),
687 (unsigned long long) idle);
688
689 seq_printf(seq,
690 " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
691 pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
692 pkt_dev->cur_src_mac_offset);
693
694 if (pkt_dev->flags & F_IPV6) {
695 char b1[128], b2[128];
696 fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
697 fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
698 seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
699 } else
700 seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
701 pkt_dev->cur_saddr, pkt_dev->cur_daddr);
702
703 seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
704 pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
705
706 seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
707
708 seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
709
710 if (pkt_dev->result[0])
711 seq_printf(seq, "Result: %s\n", pkt_dev->result);
712 else
713 seq_printf(seq, "Result: Idle\n");
714
715 return 0;
716 }
717
718
719 static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
720 __u32 *num)
721 {
722 int i = 0;
723 *num = 0;
724
725 for (; i < maxlen; i++) {
726 char c;
727 *num <<= 4;
728 if (get_user(c, &user_buffer[i]))
729 return -EFAULT;
730 if ((c >= '0') && (c <= '9'))
731 *num |= c - '0';
732 else if ((c >= 'a') && (c <= 'f'))
733 *num |= c - 'a' + 10;
734 else if ((c >= 'A') && (c <= 'F'))
735 *num |= c - 'A' + 10;
736 else
737 break;
738 }
739 return i;
740 }
741
742 static int count_trail_chars(const char __user * user_buffer,
743 unsigned int maxlen)
744 {
745 int i;
746
747 for (i = 0; i < maxlen; i++) {
748 char c;
749 if (get_user(c, &user_buffer[i]))
750 return -EFAULT;
751 switch (c) {
752 case '\"':
753 case '\n':
754 case '\r':
755 case '\t':
756 case ' ':
757 case '=':
758 break;
759 default:
760 goto done;
761 }
762 }
763 done:
764 return i;
765 }
766
767 static unsigned long num_arg(const char __user * user_buffer,
768 unsigned long maxlen, unsigned long *num)
769 {
770 int i = 0;
771 *num = 0;
772
773 for (; i < maxlen; i++) {
774 char c;
775 if (get_user(c, &user_buffer[i]))
776 return -EFAULT;
777 if ((c >= '0') && (c <= '9')) {
778 *num *= 10;
779 *num += c - '0';
780 } else
781 break;
782 }
783 return i;
784 }
785
786 static int strn_len(const char __user * user_buffer, unsigned int maxlen)
787 {
788 int i = 0;
789
790 for (; i < maxlen; i++) {
791 char c;
792 if (get_user(c, &user_buffer[i]))
793 return -EFAULT;
794 switch (c) {
795 case '\"':
796 case '\n':
797 case '\r':
798 case '\t':
799 case ' ':
800 goto done_str;
801 break;
802 default:
803 break;
804 }
805 }
806 done_str:
807 return i;
808 }
809
810 static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
811 {
812 unsigned n = 0;
813 char c;
814 ssize_t i = 0;
815 int len;
816
817 pkt_dev->nr_labels = 0;
818 do {
819 __u32 tmp;
820 len = hex32_arg(&buffer[i], 8, &tmp);
821 if (len <= 0)
822 return len;
823 pkt_dev->labels[n] = htonl(tmp);
824 if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
825 pkt_dev->flags |= F_MPLS_RND;
826 i += len;
827 if (get_user(c, &buffer[i]))
828 return -EFAULT;
829 i++;
830 n++;
831 if (n >= MAX_MPLS_LABELS)
832 return -E2BIG;
833 } while (c == ',');
834
835 pkt_dev->nr_labels = n;
836 return i;
837 }
838
839 static ssize_t pktgen_if_write(struct file *file,
840 const char __user * user_buffer, size_t count,
841 loff_t * offset)
842 {
843 struct seq_file *seq = (struct seq_file *)file->private_data;
844 struct pktgen_dev *pkt_dev = seq->private;
845 int i = 0, max, len;
846 char name[16], valstr[32];
847 unsigned long value = 0;
848 char *pg_result = NULL;
849 int tmp = 0;
850 char buf[128];
851
852 pg_result = &(pkt_dev->result[0]);
853
854 if (count < 1) {
855 printk(KERN_WARNING "pktgen: wrong command format\n");
856 return -EINVAL;
857 }
858
859 max = count - i;
860 tmp = count_trail_chars(&user_buffer[i], max);
861 if (tmp < 0) {
862 printk(KERN_WARNING "pktgen: illegal format\n");
863 return tmp;
864 }
865 i += tmp;
866
867 /* Read variable name */
868
869 len = strn_len(&user_buffer[i], sizeof(name) - 1);
870 if (len < 0)
871 return len;
872
873 memset(name, 0, sizeof(name));
874 if (copy_from_user(name, &user_buffer[i], len))
875 return -EFAULT;
876 i += len;
877
878 max = count - i;
879 len = count_trail_chars(&user_buffer[i], max);
880 if (len < 0)
881 return len;
882
883 i += len;
884
885 if (debug) {
886 char tb[count + 1];
887 if (copy_from_user(tb, user_buffer, count))
888 return -EFAULT;
889 tb[count] = 0;
890 printk(KERN_DEBUG "pktgen: %s,%lu buffer -:%s:-\n", name,
891 (unsigned long)count, tb);
892 }
893
894 if (!strcmp(name, "min_pkt_size")) {
895 len = num_arg(&user_buffer[i], 10, &value);
896 if (len < 0)
897 return len;
898
899 i += len;
900 if (value < 14 + 20 + 8)
901 value = 14 + 20 + 8;
902 if (value != pkt_dev->min_pkt_size) {
903 pkt_dev->min_pkt_size = value;
904 pkt_dev->cur_pkt_size = value;
905 }
906 sprintf(pg_result, "OK: min_pkt_size=%u",
907 pkt_dev->min_pkt_size);
908 return count;
909 }
910
911 if (!strcmp(name, "max_pkt_size")) {
912 len = num_arg(&user_buffer[i], 10, &value);
913 if (len < 0)
914 return len;
915
916 i += len;
917 if (value < 14 + 20 + 8)
918 value = 14 + 20 + 8;
919 if (value != pkt_dev->max_pkt_size) {
920 pkt_dev->max_pkt_size = value;
921 pkt_dev->cur_pkt_size = value;
922 }
923 sprintf(pg_result, "OK: max_pkt_size=%u",
924 pkt_dev->max_pkt_size);
925 return count;
926 }
927
928 /* Shortcut for min = max */
929
930 if (!strcmp(name, "pkt_size")) {
931 len = num_arg(&user_buffer[i], 10, &value);
932 if (len < 0)
933 return len;
934
935 i += len;
936 if (value < 14 + 20 + 8)
937 value = 14 + 20 + 8;
938 if (value != pkt_dev->min_pkt_size) {
939 pkt_dev->min_pkt_size = value;
940 pkt_dev->max_pkt_size = value;
941 pkt_dev->cur_pkt_size = value;
942 }
943 sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
944 return count;
945 }
946
947 if (!strcmp(name, "debug")) {
948 len = num_arg(&user_buffer[i], 10, &value);
949 if (len < 0)
950 return len;
951
952 i += len;
953 debug = value;
954 sprintf(pg_result, "OK: debug=%u", debug);
955 return count;
956 }
957
958 if (!strcmp(name, "frags")) {
959 len = num_arg(&user_buffer[i], 10, &value);
960 if (len < 0)
961 return len;
962
963 i += len;
964 pkt_dev->nfrags = value;
965 sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
966 return count;
967 }
968 if (!strcmp(name, "delay")) {
969 len = num_arg(&user_buffer[i], 10, &value);
970 if (len < 0)
971 return len;
972
973 i += len;
974 if (value == 0x7FFFFFFF)
975 pkt_dev->delay = ULLONG_MAX;
976 else
977 pkt_dev->delay = (u64)value;
978
979 sprintf(pg_result, "OK: delay=%llu",
980 (unsigned long long) pkt_dev->delay);
981 return count;
982 }
983 if (!strcmp(name, "udp_src_min")) {
984 len = num_arg(&user_buffer[i], 10, &value);
985 if (len < 0)
986 return len;
987
988 i += len;
989 if (value != pkt_dev->udp_src_min) {
990 pkt_dev->udp_src_min = value;
991 pkt_dev->cur_udp_src = value;
992 }
993 sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
994 return count;
995 }
996 if (!strcmp(name, "udp_dst_min")) {
997 len = num_arg(&user_buffer[i], 10, &value);
998 if (len < 0)
999 return len;
1000
1001 i += len;
1002 if (value != pkt_dev->udp_dst_min) {
1003 pkt_dev->udp_dst_min = value;
1004 pkt_dev->cur_udp_dst = value;
1005 }
1006 sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
1007 return count;
1008 }
1009 if (!strcmp(name, "udp_src_max")) {
1010 len = num_arg(&user_buffer[i], 10, &value);
1011 if (len < 0)
1012 return len;
1013
1014 i += len;
1015 if (value != pkt_dev->udp_src_max) {
1016 pkt_dev->udp_src_max = value;
1017 pkt_dev->cur_udp_src = value;
1018 }
1019 sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
1020 return count;
1021 }
1022 if (!strcmp(name, "udp_dst_max")) {
1023 len = num_arg(&user_buffer[i], 10, &value);
1024 if (len < 0)
1025 return len;
1026
1027 i += len;
1028 if (value != pkt_dev->udp_dst_max) {
1029 pkt_dev->udp_dst_max = value;
1030 pkt_dev->cur_udp_dst = value;
1031 }
1032 sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
1033 return count;
1034 }
1035 if (!strcmp(name, "clone_skb")) {
1036 len = num_arg(&user_buffer[i], 10, &value);
1037 if (len < 0)
1038 return len;
1039
1040 i += len;
1041 pkt_dev->clone_skb = value;
1042
1043 sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
1044 return count;
1045 }
1046 if (!strcmp(name, "count")) {
1047 len = num_arg(&user_buffer[i], 10, &value);
1048 if (len < 0)
1049 return len;
1050
1051 i += len;
1052 pkt_dev->count = value;
1053 sprintf(pg_result, "OK: count=%llu",
1054 (unsigned long long)pkt_dev->count);
1055 return count;
1056 }
1057 if (!strcmp(name, "src_mac_count")) {
1058 len = num_arg(&user_buffer[i], 10, &value);
1059 if (len < 0)
1060 return len;
1061
1062 i += len;
1063 if (pkt_dev->src_mac_count != value) {
1064 pkt_dev->src_mac_count = value;
1065 pkt_dev->cur_src_mac_offset = 0;
1066 }
1067 sprintf(pg_result, "OK: src_mac_count=%d",
1068 pkt_dev->src_mac_count);
1069 return count;
1070 }
1071 if (!strcmp(name, "dst_mac_count")) {
1072 len = num_arg(&user_buffer[i], 10, &value);
1073 if (len < 0)
1074 return len;
1075
1076 i += len;
1077 if (pkt_dev->dst_mac_count != value) {
1078 pkt_dev->dst_mac_count = value;
1079 pkt_dev->cur_dst_mac_offset = 0;
1080 }
1081 sprintf(pg_result, "OK: dst_mac_count=%d",
1082 pkt_dev->dst_mac_count);
1083 return count;
1084 }
1085 if (!strcmp(name, "node")) {
1086 len = num_arg(&user_buffer[i], 10, &value);
1087 if (len < 0)
1088 return len;
1089
1090 i += len;
1091
1092 if (node_possible(value)) {
1093 pkt_dev->node = value;
1094 sprintf(pg_result, "OK: node=%d", pkt_dev->node);
1095 }
1096 else
1097 sprintf(pg_result, "ERROR: node not possible");
1098 return count;
1099 }
1100 if (!strcmp(name, "flag")) {
1101 char f[32];
1102 memset(f, 0, 32);
1103 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1104 if (len < 0)
1105 return len;
1106
1107 if (copy_from_user(f, &user_buffer[i], len))
1108 return -EFAULT;
1109 i += len;
1110 if (strcmp(f, "IPSRC_RND") == 0)
1111 pkt_dev->flags |= F_IPSRC_RND;
1112
1113 else if (strcmp(f, "!IPSRC_RND") == 0)
1114 pkt_dev->flags &= ~F_IPSRC_RND;
1115
1116 else if (strcmp(f, "TXSIZE_RND") == 0)
1117 pkt_dev->flags |= F_TXSIZE_RND;
1118
1119 else if (strcmp(f, "!TXSIZE_RND") == 0)
1120 pkt_dev->flags &= ~F_TXSIZE_RND;
1121
1122 else if (strcmp(f, "IPDST_RND") == 0)
1123 pkt_dev->flags |= F_IPDST_RND;
1124
1125 else if (strcmp(f, "!IPDST_RND") == 0)
1126 pkt_dev->flags &= ~F_IPDST_RND;
1127
1128 else if (strcmp(f, "UDPSRC_RND") == 0)
1129 pkt_dev->flags |= F_UDPSRC_RND;
1130
1131 else if (strcmp(f, "!UDPSRC_RND") == 0)
1132 pkt_dev->flags &= ~F_UDPSRC_RND;
1133
1134 else if (strcmp(f, "UDPDST_RND") == 0)
1135 pkt_dev->flags |= F_UDPDST_RND;
1136
1137 else if (strcmp(f, "!UDPDST_RND") == 0)
1138 pkt_dev->flags &= ~F_UDPDST_RND;
1139
1140 else if (strcmp(f, "MACSRC_RND") == 0)
1141 pkt_dev->flags |= F_MACSRC_RND;
1142
1143 else if (strcmp(f, "!MACSRC_RND") == 0)
1144 pkt_dev->flags &= ~F_MACSRC_RND;
1145
1146 else if (strcmp(f, "MACDST_RND") == 0)
1147 pkt_dev->flags |= F_MACDST_RND;
1148
1149 else if (strcmp(f, "!MACDST_RND") == 0)
1150 pkt_dev->flags &= ~F_MACDST_RND;
1151
1152 else if (strcmp(f, "MPLS_RND") == 0)
1153 pkt_dev->flags |= F_MPLS_RND;
1154
1155 else if (strcmp(f, "!MPLS_RND") == 0)
1156 pkt_dev->flags &= ~F_MPLS_RND;
1157
1158 else if (strcmp(f, "VID_RND") == 0)
1159 pkt_dev->flags |= F_VID_RND;
1160
1161 else if (strcmp(f, "!VID_RND") == 0)
1162 pkt_dev->flags &= ~F_VID_RND;
1163
1164 else if (strcmp(f, "SVID_RND") == 0)
1165 pkt_dev->flags |= F_SVID_RND;
1166
1167 else if (strcmp(f, "!SVID_RND") == 0)
1168 pkt_dev->flags &= ~F_SVID_RND;
1169
1170 else if (strcmp(f, "FLOW_SEQ") == 0)
1171 pkt_dev->flags |= F_FLOW_SEQ;
1172
1173 else if (strcmp(f, "QUEUE_MAP_RND") == 0)
1174 pkt_dev->flags |= F_QUEUE_MAP_RND;
1175
1176 else if (strcmp(f, "!QUEUE_MAP_RND") == 0)
1177 pkt_dev->flags &= ~F_QUEUE_MAP_RND;
1178
1179 else if (strcmp(f, "QUEUE_MAP_CPU") == 0)
1180 pkt_dev->flags |= F_QUEUE_MAP_CPU;
1181
1182 else if (strcmp(f, "!QUEUE_MAP_CPU") == 0)
1183 pkt_dev->flags &= ~F_QUEUE_MAP_CPU;
1184 #ifdef CONFIG_XFRM
1185 else if (strcmp(f, "IPSEC") == 0)
1186 pkt_dev->flags |= F_IPSEC_ON;
1187 #endif
1188
1189 else if (strcmp(f, "!IPV6") == 0)
1190 pkt_dev->flags &= ~F_IPV6;
1191
1192 else if (strcmp(f, "NODE_ALLOC") == 0)
1193 pkt_dev->flags |= F_NODE;
1194
1195 else if (strcmp(f, "!NODE_ALLOC") == 0)
1196 pkt_dev->flags &= ~F_NODE;
1197
1198 else {
1199 sprintf(pg_result,
1200 "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
1201 f,
1202 "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
1203 "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, IPSEC, NODE_ALLOC\n");
1204 return count;
1205 }
1206 sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
1207 return count;
1208 }
1209 if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
1210 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
1211 if (len < 0)
1212 return len;
1213
1214 if (copy_from_user(buf, &user_buffer[i], len))
1215 return -EFAULT;
1216 buf[len] = 0;
1217 if (strcmp(buf, pkt_dev->dst_min) != 0) {
1218 memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
1219 strncpy(pkt_dev->dst_min, buf, len);
1220 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
1221 pkt_dev->cur_daddr = pkt_dev->daddr_min;
1222 }
1223 if (debug)
1224 printk(KERN_DEBUG "pktgen: dst_min set to: %s\n",
1225 pkt_dev->dst_min);
1226 i += len;
1227 sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
1228 return count;
1229 }
1230 if (!strcmp(name, "dst_max")) {
1231 len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
1232 if (len < 0)
1233 return len;
1234
1235
1236 if (copy_from_user(buf, &user_buffer[i], len))
1237 return -EFAULT;
1238
1239 buf[len] = 0;
1240 if (strcmp(buf, pkt_dev->dst_max) != 0) {
1241 memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
1242 strncpy(pkt_dev->dst_max, buf, len);
1243 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
1244 pkt_dev->cur_daddr = pkt_dev->daddr_max;
1245 }
1246 if (debug)
1247 printk(KERN_DEBUG "pktgen: dst_max set to: %s\n",
1248 pkt_dev->dst_max);
1249 i += len;
1250 sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
1251 return count;
1252 }
1253 if (!strcmp(name, "dst6")) {
1254 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1255 if (len < 0)
1256 return len;
1257
1258 pkt_dev->flags |= F_IPV6;
1259
1260 if (copy_from_user(buf, &user_buffer[i], len))
1261 return -EFAULT;
1262 buf[len] = 0;
1263
1264 scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1265 fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
1266
1267 ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
1268
1269 if (debug)
1270 printk(KERN_DEBUG "pktgen: dst6 set to: %s\n", buf);
1271
1272 i += len;
1273 sprintf(pg_result, "OK: dst6=%s", buf);
1274 return count;
1275 }
1276 if (!strcmp(name, "dst6_min")) {
1277 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1278 if (len < 0)
1279 return len;
1280
1281 pkt_dev->flags |= F_IPV6;
1282
1283 if (copy_from_user(buf, &user_buffer[i], len))
1284 return -EFAULT;
1285 buf[len] = 0;
1286
1287 scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1288 fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
1289
1290 ipv6_addr_copy(&pkt_dev->cur_in6_daddr,
1291 &pkt_dev->min_in6_daddr);
1292 if (debug)
1293 printk(KERN_DEBUG "pktgen: dst6_min set to: %s\n", buf);
1294
1295 i += len;
1296 sprintf(pg_result, "OK: dst6_min=%s", buf);
1297 return count;
1298 }
1299 if (!strcmp(name, "dst6_max")) {
1300 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1301 if (len < 0)
1302 return len;
1303
1304 pkt_dev->flags |= F_IPV6;
1305
1306 if (copy_from_user(buf, &user_buffer[i], len))
1307 return -EFAULT;
1308 buf[len] = 0;
1309
1310 scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1311 fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
1312
1313 if (debug)
1314 printk(KERN_DEBUG "pktgen: dst6_max set to: %s\n", buf);
1315
1316 i += len;
1317 sprintf(pg_result, "OK: dst6_max=%s", buf);
1318 return count;
1319 }
1320 if (!strcmp(name, "src6")) {
1321 len = strn_len(&user_buffer[i], sizeof(buf) - 1);
1322 if (len < 0)
1323 return len;
1324
1325 pkt_dev->flags |= F_IPV6;
1326
1327 if (copy_from_user(buf, &user_buffer[i], len))
1328 return -EFAULT;
1329 buf[len] = 0;
1330
1331 scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1332 fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
1333
1334 ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
1335
1336 if (debug)
1337 printk(KERN_DEBUG "pktgen: src6 set to: %s\n", buf);
1338
1339 i += len;
1340 sprintf(pg_result, "OK: src6=%s", buf);
1341 return count;
1342 }
1343 if (!strcmp(name, "src_min")) {
1344 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
1345 if (len < 0)
1346 return len;
1347
1348 if (copy_from_user(buf, &user_buffer[i], len))
1349 return -EFAULT;
1350 buf[len] = 0;
1351 if (strcmp(buf, pkt_dev->src_min) != 0) {
1352 memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
1353 strncpy(pkt_dev->src_min, buf, len);
1354 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
1355 pkt_dev->cur_saddr = pkt_dev->saddr_min;
1356 }
1357 if (debug)
1358 printk(KERN_DEBUG "pktgen: src_min set to: %s\n",
1359 pkt_dev->src_min);
1360 i += len;
1361 sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
1362 return count;
1363 }
1364 if (!strcmp(name, "src_max")) {
1365 len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
1366 if (len < 0)
1367 return len;
1368
1369 if (copy_from_user(buf, &user_buffer[i], len))
1370 return -EFAULT;
1371 buf[len] = 0;
1372 if (strcmp(buf, pkt_dev->src_max) != 0) {
1373 memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
1374 strncpy(pkt_dev->src_max, buf, len);
1375 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
1376 pkt_dev->cur_saddr = pkt_dev->saddr_max;
1377 }
1378 if (debug)
1379 printk(KERN_DEBUG "pktgen: src_max set to: %s\n",
1380 pkt_dev->src_max);
1381 i += len;
1382 sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
1383 return count;
1384 }
1385 if (!strcmp(name, "dst_mac")) {
1386 char *v = valstr;
1387 unsigned char old_dmac[ETH_ALEN];
1388 unsigned char *m = pkt_dev->dst_mac;
1389 memcpy(old_dmac, pkt_dev->dst_mac, ETH_ALEN);
1390
1391 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1392 if (len < 0)
1393 return len;
1394
1395 memset(valstr, 0, sizeof(valstr));
1396 if (copy_from_user(valstr, &user_buffer[i], len))
1397 return -EFAULT;
1398 i += len;
1399
1400 for (*m = 0; *v && m < pkt_dev->dst_mac + 6; v++) {
1401 if (*v >= '0' && *v <= '9') {
1402 *m *= 16;
1403 *m += *v - '0';
1404 }
1405 if (*v >= 'A' && *v <= 'F') {
1406 *m *= 16;
1407 *m += *v - 'A' + 10;
1408 }
1409 if (*v >= 'a' && *v <= 'f') {
1410 *m *= 16;
1411 *m += *v - 'a' + 10;
1412 }
1413 if (*v == ':') {
1414 m++;
1415 *m = 0;
1416 }
1417 }
1418
1419 /* Set up Dest MAC */
1420 if (compare_ether_addr(old_dmac, pkt_dev->dst_mac))
1421 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
1422
1423 sprintf(pg_result, "OK: dstmac");
1424 return count;
1425 }
1426 if (!strcmp(name, "src_mac")) {
1427 char *v = valstr;
1428 unsigned char old_smac[ETH_ALEN];
1429 unsigned char *m = pkt_dev->src_mac;
1430
1431 memcpy(old_smac, pkt_dev->src_mac, ETH_ALEN);
1432
1433 len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
1434 if (len < 0)
1435 return len;
1436
1437 memset(valstr, 0, sizeof(valstr));
1438 if (copy_from_user(valstr, &user_buffer[i], len))
1439 return -EFAULT;
1440 i += len;
1441
1442 for (*m = 0; *v && m < pkt_dev->src_mac + 6; v++) {
1443 if (*v >= '0' && *v <= '9') {
1444 *m *= 16;
1445 *m += *v - '0';
1446 }
1447 if (*v >= 'A' && *v <= 'F') {
1448 *m *= 16;
1449 *m += *v - 'A' + 10;
1450 }
1451 if (*v >= 'a' && *v <= 'f') {
1452 *m *= 16;
1453 *m += *v - 'a' + 10;
1454 }
1455 if (*v == ':') {
1456 m++;
1457 *m = 0;
1458 }
1459 }
1460
1461 /* Set up Src MAC */
1462 if (compare_ether_addr(old_smac, pkt_dev->src_mac))
1463 memcpy(&(pkt_dev->hh[6]), pkt_dev->src_mac, ETH_ALEN);
1464
1465 sprintf(pg_result, "OK: srcmac");
1466 return count;
1467 }
1468
1469 if (!strcmp(name, "clear_counters")) {
1470 pktgen_clear_counters(pkt_dev);
1471 sprintf(pg_result, "OK: Clearing counters.\n");
1472 return count;
1473 }
1474
1475 if (!strcmp(name, "flows")) {
1476 len = num_arg(&user_buffer[i], 10, &value);
1477 if (len < 0)
1478 return len;
1479
1480 i += len;
1481 if (value > MAX_CFLOWS)
1482 value = MAX_CFLOWS;
1483
1484 pkt_dev->cflows = value;
1485 sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
1486 return count;
1487 }
1488
1489 if (!strcmp(name, "flowlen")) {
1490 len = num_arg(&user_buffer[i], 10, &value);
1491 if (len < 0)
1492 return len;
1493
1494 i += len;
1495 pkt_dev->lflow = value;
1496 sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
1497 return count;
1498 }
1499
1500 if (!strcmp(name, "queue_map_min")) {
1501 len = num_arg(&user_buffer[i], 5, &value);
1502 if (len < 0)
1503 return len;
1504
1505 i += len;
1506 pkt_dev->queue_map_min = value;
1507 sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
1508 return count;
1509 }
1510
1511 if (!strcmp(name, "queue_map_max")) {
1512 len = num_arg(&user_buffer[i], 5, &value);
1513 if (len < 0)
1514 return len;
1515
1516 i += len;
1517 pkt_dev->queue_map_max = value;
1518 sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
1519 return count;
1520 }
1521
1522 if (!strcmp(name, "mpls")) {
1523 unsigned n, cnt;
1524
1525 len = get_labels(&user_buffer[i], pkt_dev);
1526 if (len < 0)
1527 return len;
1528 i += len;
1529 cnt = sprintf(pg_result, "OK: mpls=");
1530 for (n = 0; n < pkt_dev->nr_labels; n++)
1531 cnt += sprintf(pg_result + cnt,
1532 "%08x%s", ntohl(pkt_dev->labels[n]),
1533 n == pkt_dev->nr_labels-1 ? "" : ",");
1534
1535 if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
1536 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1537 pkt_dev->svlan_id = 0xffff;
1538
1539 if (debug)
1540 printk(KERN_DEBUG "pktgen: VLAN/SVLAN auto turned off\n");
1541 }
1542 return count;
1543 }
1544
1545 if (!strcmp(name, "vlan_id")) {
1546 len = num_arg(&user_buffer[i], 4, &value);
1547 if (len < 0)
1548 return len;
1549
1550 i += len;
1551 if (value <= 4095) {
1552 pkt_dev->vlan_id = value; /* turn on VLAN */
1553
1554 if (debug)
1555 printk(KERN_DEBUG "pktgen: VLAN turned on\n");
1556
1557 if (debug && pkt_dev->nr_labels)
1558 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1559
1560 pkt_dev->nr_labels = 0; /* turn off MPLS */
1561 sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
1562 } else {
1563 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1564 pkt_dev->svlan_id = 0xffff;
1565
1566 if (debug)
1567 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1568 }
1569 return count;
1570 }
1571
1572 if (!strcmp(name, "vlan_p")) {
1573 len = num_arg(&user_buffer[i], 1, &value);
1574 if (len < 0)
1575 return len;
1576
1577 i += len;
1578 if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
1579 pkt_dev->vlan_p = value;
1580 sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
1581 } else {
1582 sprintf(pg_result, "ERROR: vlan_p must be 0-7");
1583 }
1584 return count;
1585 }
1586
1587 if (!strcmp(name, "vlan_cfi")) {
1588 len = num_arg(&user_buffer[i], 1, &value);
1589 if (len < 0)
1590 return len;
1591
1592 i += len;
1593 if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
1594 pkt_dev->vlan_cfi = value;
1595 sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
1596 } else {
1597 sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
1598 }
1599 return count;
1600 }
1601
1602 if (!strcmp(name, "svlan_id")) {
1603 len = num_arg(&user_buffer[i], 4, &value);
1604 if (len < 0)
1605 return len;
1606
1607 i += len;
1608 if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
1609 pkt_dev->svlan_id = value; /* turn on SVLAN */
1610
1611 if (debug)
1612 printk(KERN_DEBUG "pktgen: SVLAN turned on\n");
1613
1614 if (debug && pkt_dev->nr_labels)
1615 printk(KERN_DEBUG "pktgen: MPLS auto turned off\n");
1616
1617 pkt_dev->nr_labels = 0; /* turn off MPLS */
1618 sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
1619 } else {
1620 pkt_dev->vlan_id = 0xffff; /* turn off VLAN/SVLAN */
1621 pkt_dev->svlan_id = 0xffff;
1622
1623 if (debug)
1624 printk(KERN_DEBUG "pktgen: VLAN/SVLAN turned off\n");
1625 }
1626 return count;
1627 }
1628
1629 if (!strcmp(name, "svlan_p")) {
1630 len = num_arg(&user_buffer[i], 1, &value);
1631 if (len < 0)
1632 return len;
1633
1634 i += len;
1635 if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
1636 pkt_dev->svlan_p = value;
1637 sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
1638 } else {
1639 sprintf(pg_result, "ERROR: svlan_p must be 0-7");
1640 }
1641 return count;
1642 }
1643
1644 if (!strcmp(name, "svlan_cfi")) {
1645 len = num_arg(&user_buffer[i], 1, &value);
1646 if (len < 0)
1647 return len;
1648
1649 i += len;
1650 if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
1651 pkt_dev->svlan_cfi = value;
1652 sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
1653 } else {
1654 sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
1655 }
1656 return count;
1657 }
1658
1659 if (!strcmp(name, "tos")) {
1660 __u32 tmp_value = 0;
1661 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1662 if (len < 0)
1663 return len;
1664
1665 i += len;
1666 if (len == 2) {
1667 pkt_dev->tos = tmp_value;
1668 sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
1669 } else {
1670 sprintf(pg_result, "ERROR: tos must be 00-ff");
1671 }
1672 return count;
1673 }
1674
1675 if (!strcmp(name, "traffic_class")) {
1676 __u32 tmp_value = 0;
1677 len = hex32_arg(&user_buffer[i], 2, &tmp_value);
1678 if (len < 0)
1679 return len;
1680
1681 i += len;
1682 if (len == 2) {
1683 pkt_dev->traffic_class = tmp_value;
1684 sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
1685 } else {
1686 sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
1687 }
1688 return count;
1689 }
1690
1691 sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
1692 return -EINVAL;
1693 }
1694
1695 static int pktgen_if_open(struct inode *inode, struct file *file)
1696 {
1697 return single_open(file, pktgen_if_show, PDE(inode)->data);
1698 }
1699
1700 static const struct file_operations pktgen_if_fops = {
1701 .owner = THIS_MODULE,
1702 .open = pktgen_if_open,
1703 .read = seq_read,
1704 .llseek = seq_lseek,
1705 .write = pktgen_if_write,
1706 .release = single_release,
1707 };
1708
1709 static int pktgen_thread_show(struct seq_file *seq, void *v)
1710 {
1711 struct pktgen_thread *t = seq->private;
1712 const struct pktgen_dev *pkt_dev;
1713
1714 BUG_ON(!t);
1715
1716 seq_printf(seq, "Running: ");
1717
1718 if_lock(t);
1719 list_for_each_entry(pkt_dev, &t->if_list, list)
1720 if (pkt_dev->running)
1721 seq_printf(seq, "%s ", pkt_dev->odevname);
1722
1723 seq_printf(seq, "\nStopped: ");
1724
1725 list_for_each_entry(pkt_dev, &t->if_list, list)
1726 if (!pkt_dev->running)
1727 seq_printf(seq, "%s ", pkt_dev->odevname);
1728
1729 if (t->result[0])
1730 seq_printf(seq, "\nResult: %s\n", t->result);
1731 else
1732 seq_printf(seq, "\nResult: NA\n");
1733
1734 if_unlock(t);
1735
1736 return 0;
1737 }
1738
1739 static ssize_t pktgen_thread_write(struct file *file,
1740 const char __user * user_buffer,
1741 size_t count, loff_t * offset)
1742 {
1743 struct seq_file *seq = (struct seq_file *)file->private_data;
1744 struct pktgen_thread *t = seq->private;
1745 int i = 0, max, len, ret;
1746 char name[40];
1747 char *pg_result;
1748
1749 if (count < 1) {
1750 // sprintf(pg_result, "Wrong command format");
1751 return -EINVAL;
1752 }
1753
1754 max = count - i;
1755 len = count_trail_chars(&user_buffer[i], max);
1756 if (len < 0)
1757 return len;
1758
1759 i += len;
1760
1761 /* Read variable name */
1762
1763 len = strn_len(&user_buffer[i], sizeof(name) - 1);
1764 if (len < 0)
1765 return len;
1766
1767 memset(name, 0, sizeof(name));
1768 if (copy_from_user(name, &user_buffer[i], len))
1769 return -EFAULT;
1770 i += len;
1771
1772 max = count - i;
1773 len = count_trail_chars(&user_buffer[i], max);
1774 if (len < 0)
1775 return len;
1776
1777 i += len;
1778
1779 if (debug)
1780 printk(KERN_DEBUG "pktgen: t=%s, count=%lu\n",
1781 name, (unsigned long)count);
1782
1783 if (!t) {
1784 printk(KERN_ERR "pktgen: ERROR: No thread\n");
1785 ret = -EINVAL;
1786 goto out;
1787 }
1788
1789 pg_result = &(t->result[0]);
1790
1791 if (!strcmp(name, "add_device")) {
1792 char f[32];
1793 memset(f, 0, 32);
1794 len = strn_len(&user_buffer[i], sizeof(f) - 1);
1795 if (len < 0) {
1796 ret = len;
1797 goto out;
1798 }
1799 if (copy_from_user(f, &user_buffer[i], len))
1800 return -EFAULT;
1801 i += len;
1802 mutex_lock(&pktgen_thread_lock);
1803 pktgen_add_device(t, f);
1804 mutex_unlock(&pktgen_thread_lock);
1805 ret = count;
1806 sprintf(pg_result, "OK: add_device=%s", f);
1807 goto out;
1808 }
1809
1810 if (!strcmp(name, "rem_device_all")) {
1811 mutex_lock(&pktgen_thread_lock);
1812 t->control |= T_REMDEVALL;
1813 mutex_unlock(&pktgen_thread_lock);
1814 schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
1815 ret = count;
1816 sprintf(pg_result, "OK: rem_device_all");
1817 goto out;
1818 }
1819
1820 if (!strcmp(name, "max_before_softirq")) {
1821 sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
1822 ret = count;
1823 goto out;
1824 }
1825
1826 ret = -EINVAL;
1827 out:
1828 return ret;
1829 }
1830
1831 static int pktgen_thread_open(struct inode *inode, struct file *file)
1832 {
1833 return single_open(file, pktgen_thread_show, PDE(inode)->data);
1834 }
1835
1836 static const struct file_operations pktgen_thread_fops = {
1837 .owner = THIS_MODULE,
1838 .open = pktgen_thread_open,
1839 .read = seq_read,
1840 .llseek = seq_lseek,
1841 .write = pktgen_thread_write,
1842 .release = single_release,
1843 };
1844
1845 /* Think find or remove for NN */
1846 static struct pktgen_dev *__pktgen_NN_threads(const char *ifname, int remove)
1847 {
1848 struct pktgen_thread *t;
1849 struct pktgen_dev *pkt_dev = NULL;
1850 bool exact = (remove == FIND);
1851
1852 list_for_each_entry(t, &pktgen_threads, th_list) {
1853 pkt_dev = pktgen_find_dev(t, ifname, exact);
1854 if (pkt_dev) {
1855 if (remove) {
1856 if_lock(t);
1857 pkt_dev->removal_mark = 1;
1858 t->control |= T_REMDEV;
1859 if_unlock(t);
1860 }
1861 break;
1862 }
1863 }
1864 return pkt_dev;
1865 }
1866
1867 /*
1868 * mark a device for removal
1869 */
1870 static void pktgen_mark_device(const char *ifname)
1871 {
1872 struct pktgen_dev *pkt_dev = NULL;
1873 const int max_tries = 10, msec_per_try = 125;
1874 int i = 0;
1875
1876 mutex_lock(&pktgen_thread_lock);
1877 pr_debug("pktgen: pktgen_mark_device marking %s for removal\n", ifname);
1878
1879 while (1) {
1880
1881 pkt_dev = __pktgen_NN_threads(ifname, REMOVE);
1882 if (pkt_dev == NULL)
1883 break; /* success */
1884
1885 mutex_unlock(&pktgen_thread_lock);
1886 pr_debug("pktgen: pktgen_mark_device waiting for %s "
1887 "to disappear....\n", ifname);
1888 schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
1889 mutex_lock(&pktgen_thread_lock);
1890
1891 if (++i >= max_tries) {
1892 printk(KERN_ERR "pktgen_mark_device: timed out after "
1893 "waiting %d msec for device %s to be removed\n",
1894 msec_per_try * i, ifname);
1895 break;
1896 }
1897
1898 }
1899
1900 mutex_unlock(&pktgen_thread_lock);
1901 }
1902
1903 static void pktgen_change_name(struct net_device *dev)
1904 {
1905 struct pktgen_thread *t;
1906
1907 list_for_each_entry(t, &pktgen_threads, th_list) {
1908 struct pktgen_dev *pkt_dev;
1909
1910 list_for_each_entry(pkt_dev, &t->if_list, list) {
1911 if (pkt_dev->odev != dev)
1912 continue;
1913
1914 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
1915
1916 pkt_dev->entry = proc_create_data(dev->name, 0600,
1917 pg_proc_dir,
1918 &pktgen_if_fops,
1919 pkt_dev);
1920 if (!pkt_dev->entry)
1921 printk(KERN_ERR "pktgen: can't move proc "
1922 " entry for '%s'\n", dev->name);
1923 break;
1924 }
1925 }
1926 }
1927
1928 static int pktgen_device_event(struct notifier_block *unused,
1929 unsigned long event, void *ptr)
1930 {
1931 struct net_device *dev = ptr;
1932
1933 if (!net_eq(dev_net(dev), &init_net))
1934 return NOTIFY_DONE;
1935
1936 /* It is OK that we do not hold the group lock right now,
1937 * as we run under the RTNL lock.
1938 */
1939
1940 switch (event) {
1941 case NETDEV_CHANGENAME:
1942 pktgen_change_name(dev);
1943 break;
1944
1945 case NETDEV_UNREGISTER:
1946 pktgen_mark_device(dev->name);
1947 break;
1948 }
1949
1950 return NOTIFY_DONE;
1951 }
1952
1953 static struct net_device *pktgen_dev_get_by_name(struct pktgen_dev *pkt_dev,
1954 const char *ifname)
1955 {
1956 char b[IFNAMSIZ+5];
1957 int i = 0;
1958
1959 for (i = 0; ifname[i] != '@'; i++) {
1960 if (i == IFNAMSIZ)
1961 break;
1962
1963 b[i] = ifname[i];
1964 }
1965 b[i] = 0;
1966
1967 return dev_get_by_name(&init_net, b);
1968 }
1969
1970
1971 /* Associate pktgen_dev with a device. */
1972
1973 static int pktgen_setup_dev(struct pktgen_dev *pkt_dev, const char *ifname)
1974 {
1975 struct net_device *odev;
1976 int err;
1977
1978 /* Clean old setups */
1979 if (pkt_dev->odev) {
1980 dev_put(pkt_dev->odev);
1981 pkt_dev->odev = NULL;
1982 }
1983
1984 odev = pktgen_dev_get_by_name(pkt_dev, ifname);
1985 if (!odev) {
1986 printk(KERN_ERR "pktgen: no such netdevice: \"%s\"\n", ifname);
1987 return -ENODEV;
1988 }
1989
1990 if (odev->type != ARPHRD_ETHER) {
1991 printk(KERN_ERR "pktgen: not an ethernet device: \"%s\"\n", ifname);
1992 err = -EINVAL;
1993 } else if (!netif_running(odev)) {
1994 printk(KERN_ERR "pktgen: device is down: \"%s\"\n", ifname);
1995 err = -ENETDOWN;
1996 } else {
1997 pkt_dev->odev = odev;
1998 return 0;
1999 }
2000
2001 dev_put(odev);
2002 return err;
2003 }
2004
2005 /* Read pkt_dev from the interface and set up internal pktgen_dev
2006 * structure to have the right information to create/send packets
2007 */
2008 static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
2009 {
2010 int ntxq;
2011
2012 if (!pkt_dev->odev) {
2013 printk(KERN_ERR "pktgen: ERROR: pkt_dev->odev == NULL in "
2014 "setup_inject.\n");
2015 sprintf(pkt_dev->result,
2016 "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
2017 return;
2018 }
2019
2020 /* make sure that we don't pick a non-existing transmit queue */
2021 ntxq = pkt_dev->odev->real_num_tx_queues;
2022
2023 if (ntxq <= pkt_dev->queue_map_min) {
2024 printk(KERN_WARNING "pktgen: WARNING: Requested "
2025 "queue_map_min (zero-based) (%d) exceeds valid range "
2026 "[0 - %d] for (%d) queues on %s, resetting\n",
2027 pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
2028 pkt_dev->odevname);
2029 pkt_dev->queue_map_min = ntxq - 1;
2030 }
2031 if (pkt_dev->queue_map_max >= ntxq) {
2032 printk(KERN_WARNING "pktgen: WARNING: Requested "
2033 "queue_map_max (zero-based) (%d) exceeds valid range "
2034 "[0 - %d] for (%d) queues on %s, resetting\n",
2035 pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
2036 pkt_dev->odevname);
2037 pkt_dev->queue_map_max = ntxq - 1;
2038 }
2039
2040 /* Default to the interface's mac if not explicitly set. */
2041
2042 if (is_zero_ether_addr(pkt_dev->src_mac))
2043 memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, ETH_ALEN);
2044
2045 /* Set up Dest MAC */
2046 memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, ETH_ALEN);
2047
2048 /* Set up pkt size */
2049 pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
2050
2051 if (pkt_dev->flags & F_IPV6) {
2052 /*
2053 * Skip this automatic address setting until locks or functions
2054 * gets exported
2055 */
2056
2057 #ifdef NOTNOW
2058 int i, set = 0, err = 1;
2059 struct inet6_dev *idev;
2060
2061 for (i = 0; i < IN6_ADDR_HSIZE; i++)
2062 if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
2063 set = 1;
2064 break;
2065 }
2066
2067 if (!set) {
2068
2069 /*
2070 * Use linklevel address if unconfigured.
2071 *
2072 * use ipv6_get_lladdr if/when it's get exported
2073 */
2074
2075 rcu_read_lock();
2076 idev = __in6_dev_get(pkt_dev->odev);
2077 if (idev) {
2078 struct inet6_ifaddr *ifp;
2079
2080 read_lock_bh(&idev->lock);
2081 for (ifp = idev->addr_list; ifp;
2082 ifp = ifp->if_next) {
2083 if (ifp->scope == IFA_LINK &&
2084 !(ifp->flags & IFA_F_TENTATIVE)) {
2085 ipv6_addr_copy(&pkt_dev->
2086 cur_in6_saddr,
2087 &ifp->addr);
2088 err = 0;
2089 break;
2090 }
2091 }
2092 read_unlock_bh(&idev->lock);
2093 }
2094 rcu_read_unlock();
2095 if (err)
2096 printk(KERN_ERR "pktgen: ERROR: IPv6 link "
2097 "address not availble.\n");
2098 }
2099 #endif
2100 } else {
2101 pkt_dev->saddr_min = 0;
2102 pkt_dev->saddr_max = 0;
2103 if (strlen(pkt_dev->src_min) == 0) {
2104
2105 struct in_device *in_dev;
2106
2107 rcu_read_lock();
2108 in_dev = __in_dev_get_rcu(pkt_dev->odev);
2109 if (in_dev) {
2110 if (in_dev->ifa_list) {
2111 pkt_dev->saddr_min =
2112 in_dev->ifa_list->ifa_address;
2113 pkt_dev->saddr_max = pkt_dev->saddr_min;
2114 }
2115 }
2116 rcu_read_unlock();
2117 } else {
2118 pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
2119 pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
2120 }
2121
2122 pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
2123 pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
2124 }
2125 /* Initialize current values. */
2126 pkt_dev->cur_dst_mac_offset = 0;
2127 pkt_dev->cur_src_mac_offset = 0;
2128 pkt_dev->cur_saddr = pkt_dev->saddr_min;
2129 pkt_dev->cur_daddr = pkt_dev->daddr_min;
2130 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2131 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2132 pkt_dev->nflows = 0;
2133 }
2134
2135
2136 static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
2137 {
2138 ktime_t start_time, end_time;
2139 s64 remaining;
2140 struct hrtimer_sleeper t;
2141
2142 hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
2143 hrtimer_set_expires(&t.timer, spin_until);
2144
2145 remaining = ktime_to_us(hrtimer_expires_remaining(&t.timer));
2146 if (remaining <= 0) {
2147 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2148 return;
2149 }
2150
2151 start_time = ktime_now();
2152 if (remaining < 100)
2153 udelay(remaining); /* really small just spin */
2154 else {
2155 /* see do_nanosleep */
2156 hrtimer_init_sleeper(&t, current);
2157 do {
2158 set_current_state(TASK_INTERRUPTIBLE);
2159 hrtimer_start_expires(&t.timer, HRTIMER_MODE_ABS);
2160 if (!hrtimer_active(&t.timer))
2161 t.task = NULL;
2162
2163 if (likely(t.task))
2164 schedule();
2165
2166 hrtimer_cancel(&t.timer);
2167 } while (t.task && pkt_dev->running && !signal_pending(current));
2168 __set_current_state(TASK_RUNNING);
2169 }
2170 end_time = ktime_now();
2171
2172 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
2173 pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
2174 }
2175
2176 static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
2177 {
2178 pkt_dev->pkt_overhead = 0;
2179 pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
2180 pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
2181 pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
2182 }
2183
2184 static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
2185 {
2186 return !!(pkt_dev->flows[flow].flags & F_INIT);
2187 }
2188
2189 static inline int f_pick(struct pktgen_dev *pkt_dev)
2190 {
2191 int flow = pkt_dev->curfl;
2192
2193 if (pkt_dev->flags & F_FLOW_SEQ) {
2194 if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
2195 /* reset time */
2196 pkt_dev->flows[flow].count = 0;
2197 pkt_dev->flows[flow].flags = 0;
2198 pkt_dev->curfl += 1;
2199 if (pkt_dev->curfl >= pkt_dev->cflows)
2200 pkt_dev->curfl = 0; /*reset */
2201 }
2202 } else {
2203 flow = random32() % pkt_dev->cflows;
2204 pkt_dev->curfl = flow;
2205
2206 if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
2207 pkt_dev->flows[flow].count = 0;
2208 pkt_dev->flows[flow].flags = 0;
2209 }
2210 }
2211
2212 return pkt_dev->curfl;
2213 }
2214
2215
2216 #ifdef CONFIG_XFRM
2217 /* If there was already an IPSEC SA, we keep it as is, else
2218 * we go look for it ...
2219 */
2220 #define DUMMY_MARK 0
2221 static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
2222 {
2223 struct xfrm_state *x = pkt_dev->flows[flow].x;
2224 if (!x) {
2225 /*slow path: we dont already have xfrm_state*/
2226 x = xfrm_stateonly_find(&init_net, DUMMY_MARK,
2227 (xfrm_address_t *)&pkt_dev->cur_daddr,
2228 (xfrm_address_t *)&pkt_dev->cur_saddr,
2229 AF_INET,
2230 pkt_dev->ipsmode,
2231 pkt_dev->ipsproto, 0);
2232 if (x) {
2233 pkt_dev->flows[flow].x = x;
2234 set_pkt_overhead(pkt_dev);
2235 pkt_dev->pkt_overhead += x->props.header_len;
2236 }
2237
2238 }
2239 }
2240 #endif
2241 static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
2242 {
2243
2244 if (pkt_dev->flags & F_QUEUE_MAP_CPU)
2245 pkt_dev->cur_queue_map = smp_processor_id();
2246
2247 else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
2248 __u16 t;
2249 if (pkt_dev->flags & F_QUEUE_MAP_RND) {
2250 t = random32() %
2251 (pkt_dev->queue_map_max -
2252 pkt_dev->queue_map_min + 1)
2253 + pkt_dev->queue_map_min;
2254 } else {
2255 t = pkt_dev->cur_queue_map + 1;
2256 if (t > pkt_dev->queue_map_max)
2257 t = pkt_dev->queue_map_min;
2258 }
2259 pkt_dev->cur_queue_map = t;
2260 }
2261 pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
2262 }
2263
2264 /* Increment/randomize headers according to flags and current values
2265 * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
2266 */
2267 static void mod_cur_headers(struct pktgen_dev *pkt_dev)
2268 {
2269 __u32 imn;
2270 __u32 imx;
2271 int flow = 0;
2272
2273 if (pkt_dev->cflows)
2274 flow = f_pick(pkt_dev);
2275
2276 /* Deal with source MAC */
2277 if (pkt_dev->src_mac_count > 1) {
2278 __u32 mc;
2279 __u32 tmp;
2280
2281 if (pkt_dev->flags & F_MACSRC_RND)
2282 mc = random32() % pkt_dev->src_mac_count;
2283 else {
2284 mc = pkt_dev->cur_src_mac_offset++;
2285 if (pkt_dev->cur_src_mac_offset >=
2286 pkt_dev->src_mac_count)
2287 pkt_dev->cur_src_mac_offset = 0;
2288 }
2289
2290 tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
2291 pkt_dev->hh[11] = tmp;
2292 tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2293 pkt_dev->hh[10] = tmp;
2294 tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2295 pkt_dev->hh[9] = tmp;
2296 tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2297 pkt_dev->hh[8] = tmp;
2298 tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
2299 pkt_dev->hh[7] = tmp;
2300 }
2301
2302 /* Deal with Destination MAC */
2303 if (pkt_dev->dst_mac_count > 1) {
2304 __u32 mc;
2305 __u32 tmp;
2306
2307 if (pkt_dev->flags & F_MACDST_RND)
2308 mc = random32() % pkt_dev->dst_mac_count;
2309
2310 else {
2311 mc = pkt_dev->cur_dst_mac_offset++;
2312 if (pkt_dev->cur_dst_mac_offset >=
2313 pkt_dev->dst_mac_count) {
2314 pkt_dev->cur_dst_mac_offset = 0;
2315 }
2316 }
2317
2318 tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
2319 pkt_dev->hh[5] = tmp;
2320 tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
2321 pkt_dev->hh[4] = tmp;
2322 tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
2323 pkt_dev->hh[3] = tmp;
2324 tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
2325 pkt_dev->hh[2] = tmp;
2326 tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
2327 pkt_dev->hh[1] = tmp;
2328 }
2329
2330 if (pkt_dev->flags & F_MPLS_RND) {
2331 unsigned i;
2332 for (i = 0; i < pkt_dev->nr_labels; i++)
2333 if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
2334 pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
2335 ((__force __be32)random32() &
2336 htonl(0x000fffff));
2337 }
2338
2339 if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
2340 pkt_dev->vlan_id = random32() & (4096-1);
2341 }
2342
2343 if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
2344 pkt_dev->svlan_id = random32() & (4096 - 1);
2345 }
2346
2347 if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
2348 if (pkt_dev->flags & F_UDPSRC_RND)
2349 pkt_dev->cur_udp_src = random32() %
2350 (pkt_dev->udp_src_max - pkt_dev->udp_src_min)
2351 + pkt_dev->udp_src_min;
2352
2353 else {
2354 pkt_dev->cur_udp_src++;
2355 if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
2356 pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
2357 }
2358 }
2359
2360 if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
2361 if (pkt_dev->flags & F_UDPDST_RND) {
2362 pkt_dev->cur_udp_dst = random32() %
2363 (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)
2364 + pkt_dev->udp_dst_min;
2365 } else {
2366 pkt_dev->cur_udp_dst++;
2367 if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
2368 pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
2369 }
2370 }
2371
2372 if (!(pkt_dev->flags & F_IPV6)) {
2373
2374 imn = ntohl(pkt_dev->saddr_min);
2375 imx = ntohl(pkt_dev->saddr_max);
2376 if (imn < imx) {
2377 __u32 t;
2378 if (pkt_dev->flags & F_IPSRC_RND)
2379 t = random32() % (imx - imn) + imn;
2380 else {
2381 t = ntohl(pkt_dev->cur_saddr);
2382 t++;
2383 if (t > imx)
2384 t = imn;
2385
2386 }
2387 pkt_dev->cur_saddr = htonl(t);
2388 }
2389
2390 if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
2391 pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
2392 } else {
2393 imn = ntohl(pkt_dev->daddr_min);
2394 imx = ntohl(pkt_dev->daddr_max);
2395 if (imn < imx) {
2396 __u32 t;
2397 __be32 s;
2398 if (pkt_dev->flags & F_IPDST_RND) {
2399
2400 t = random32() % (imx - imn) + imn;
2401 s = htonl(t);
2402
2403 while (ipv4_is_loopback(s) ||
2404 ipv4_is_multicast(s) ||
2405 ipv4_is_lbcast(s) ||
2406 ipv4_is_zeronet(s) ||
2407 ipv4_is_local_multicast(s)) {
2408 t = random32() % (imx - imn) + imn;
2409 s = htonl(t);
2410 }
2411 pkt_dev->cur_daddr = s;
2412 } else {
2413 t = ntohl(pkt_dev->cur_daddr);
2414 t++;
2415 if (t > imx) {
2416 t = imn;
2417 }
2418 pkt_dev->cur_daddr = htonl(t);
2419 }
2420 }
2421 if (pkt_dev->cflows) {
2422 pkt_dev->flows[flow].flags |= F_INIT;
2423 pkt_dev->flows[flow].cur_daddr =
2424 pkt_dev->cur_daddr;
2425 #ifdef CONFIG_XFRM
2426 if (pkt_dev->flags & F_IPSEC_ON)
2427 get_ipsec_sa(pkt_dev, flow);
2428 #endif
2429 pkt_dev->nflows++;
2430 }
2431 }
2432 } else { /* IPV6 * */
2433
2434 if (pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
2435 pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
2436 pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
2437 pkt_dev->min_in6_daddr.s6_addr32[3] == 0) ;
2438 else {
2439 int i;
2440
2441 /* Only random destinations yet */
2442
2443 for (i = 0; i < 4; i++) {
2444 pkt_dev->cur_in6_daddr.s6_addr32[i] =
2445 (((__force __be32)random32() |
2446 pkt_dev->min_in6_daddr.s6_addr32[i]) &
2447 pkt_dev->max_in6_daddr.s6_addr32[i]);
2448 }
2449 }
2450 }
2451
2452 if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
2453 __u32 t;
2454 if (pkt_dev->flags & F_TXSIZE_RND) {
2455 t = random32() %
2456 (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)
2457 + pkt_dev->min_pkt_size;
2458 } else {
2459 t = pkt_dev->cur_pkt_size + 1;
2460 if (t > pkt_dev->max_pkt_size)
2461 t = pkt_dev->min_pkt_size;
2462 }
2463 pkt_dev->cur_pkt_size = t;
2464 }
2465
2466 set_cur_queue_map(pkt_dev);
2467
2468 pkt_dev->flows[flow].count++;
2469 }
2470
2471
2472 #ifdef CONFIG_XFRM
2473 static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
2474 {
2475 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2476 int err = 0;
2477 struct iphdr *iph;
2478
2479 if (!x)
2480 return 0;
2481 /* XXX: we dont support tunnel mode for now until
2482 * we resolve the dst issue */
2483 if (x->props.mode != XFRM_MODE_TRANSPORT)
2484 return 0;
2485
2486 spin_lock(&x->lock);
2487 iph = ip_hdr(skb);
2488
2489 err = x->outer_mode->output(x, skb);
2490 if (err)
2491 goto error;
2492 err = x->type->output(x, skb);
2493 if (err)
2494 goto error;
2495
2496 x->curlft.bytes += skb->len;
2497 x->curlft.packets++;
2498 error:
2499 spin_unlock(&x->lock);
2500 return err;
2501 }
2502
2503 static void free_SAs(struct pktgen_dev *pkt_dev)
2504 {
2505 if (pkt_dev->cflows) {
2506 /* let go of the SAs if we have them */
2507 int i = 0;
2508 for (; i < pkt_dev->cflows; i++) {
2509 struct xfrm_state *x = pkt_dev->flows[i].x;
2510 if (x) {
2511 xfrm_state_put(x);
2512 pkt_dev->flows[i].x = NULL;
2513 }
2514 }
2515 }
2516 }
2517
2518 static int process_ipsec(struct pktgen_dev *pkt_dev,
2519 struct sk_buff *skb, __be16 protocol)
2520 {
2521 if (pkt_dev->flags & F_IPSEC_ON) {
2522 struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
2523 int nhead = 0;
2524 if (x) {
2525 int ret;
2526 __u8 *eth;
2527 nhead = x->props.header_len - skb_headroom(skb);
2528 if (nhead > 0) {
2529 ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
2530 if (ret < 0) {
2531 printk(KERN_ERR "Error expanding "
2532 "ipsec packet %d\n", ret);
2533 goto err;
2534 }
2535 }
2536
2537 /* ipsec is not expecting ll header */
2538 skb_pull(skb, ETH_HLEN);
2539 ret = pktgen_output_ipsec(skb, pkt_dev);
2540 if (ret) {
2541 printk(KERN_ERR "Error creating ipsec "
2542 "packet %d\n", ret);
2543 goto err;
2544 }
2545 /* restore ll */
2546 eth = (__u8 *) skb_push(skb, ETH_HLEN);
2547 memcpy(eth, pkt_dev->hh, 12);
2548 *(u16 *) &eth[12] = protocol;
2549 }
2550 }
2551 return 1;
2552 err:
2553 kfree_skb(skb);
2554 return 0;
2555 }
2556 #endif
2557
2558 static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
2559 {
2560 unsigned i;
2561 for (i = 0; i < pkt_dev->nr_labels; i++)
2562 *mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
2563
2564 mpls--;
2565 *mpls |= MPLS_STACK_BOTTOM;
2566 }
2567
2568 static inline __be16 build_tci(unsigned int id, unsigned int cfi,
2569 unsigned int prio)
2570 {
2571 return htons(id | (cfi << 12) | (prio << 13));
2572 }
2573
2574 static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
2575 struct pktgen_dev *pkt_dev)
2576 {
2577 struct sk_buff *skb = NULL;
2578 __u8 *eth;
2579 struct udphdr *udph;
2580 int datalen, iplen;
2581 struct iphdr *iph;
2582 struct pktgen_hdr *pgh = NULL;
2583 __be16 protocol = htons(ETH_P_IP);
2584 __be32 *mpls;
2585 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2586 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2587 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2588 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2589 u16 queue_map;
2590
2591 if (pkt_dev->nr_labels)
2592 protocol = htons(ETH_P_MPLS_UC);
2593
2594 if (pkt_dev->vlan_id != 0xffff)
2595 protocol = htons(ETH_P_8021Q);
2596
2597 /* Update any of the values, used when we're incrementing various
2598 * fields.
2599 */
2600 queue_map = pkt_dev->cur_queue_map;
2601 mod_cur_headers(pkt_dev);
2602
2603 datalen = (odev->hard_header_len + 16) & ~0xf;
2604
2605 if (pkt_dev->flags & F_NODE) {
2606 int node;
2607
2608 if (pkt_dev->node >= 0)
2609 node = pkt_dev->node;
2610 else
2611 node = numa_node_id();
2612
2613 skb = __alloc_skb(NET_SKB_PAD + pkt_dev->cur_pkt_size + 64
2614 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT, 0, node);
2615 if (likely(skb)) {
2616 skb_reserve(skb, NET_SKB_PAD);
2617 skb->dev = odev;
2618 }
2619 }
2620 else
2621 skb = __netdev_alloc_skb(odev,
2622 pkt_dev->cur_pkt_size + 64
2623 + datalen + pkt_dev->pkt_overhead, GFP_NOWAIT);
2624
2625 if (!skb) {
2626 sprintf(pkt_dev->result, "No memory");
2627 return NULL;
2628 }
2629
2630 skb_reserve(skb, datalen);
2631
2632 /* Reserve for ethernet and IP header */
2633 eth = (__u8 *) skb_push(skb, 14);
2634 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2635 if (pkt_dev->nr_labels)
2636 mpls_push(mpls, pkt_dev);
2637
2638 if (pkt_dev->vlan_id != 0xffff) {
2639 if (pkt_dev->svlan_id != 0xffff) {
2640 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2641 *svlan_tci = build_tci(pkt_dev->svlan_id,
2642 pkt_dev->svlan_cfi,
2643 pkt_dev->svlan_p);
2644 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2645 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2646 }
2647 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2648 *vlan_tci = build_tci(pkt_dev->vlan_id,
2649 pkt_dev->vlan_cfi,
2650 pkt_dev->vlan_p);
2651 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2652 *vlan_encapsulated_proto = htons(ETH_P_IP);
2653 }
2654
2655 skb->network_header = skb->tail;
2656 skb->transport_header = skb->network_header + sizeof(struct iphdr);
2657 skb_put(skb, sizeof(struct iphdr) + sizeof(struct udphdr));
2658 skb_set_queue_mapping(skb, queue_map);
2659 iph = ip_hdr(skb);
2660 udph = udp_hdr(skb);
2661
2662 memcpy(eth, pkt_dev->hh, 12);
2663 *(__be16 *) & eth[12] = protocol;
2664
2665 /* Eth + IPh + UDPh + mpls */
2666 datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
2667 pkt_dev->pkt_overhead;
2668 if (datalen < sizeof(struct pktgen_hdr))
2669 datalen = sizeof(struct pktgen_hdr);
2670
2671 udph->source = htons(pkt_dev->cur_udp_src);
2672 udph->dest = htons(pkt_dev->cur_udp_dst);
2673 udph->len = htons(datalen + 8); /* DATA + udphdr */
2674 udph->check = 0; /* No checksum */
2675
2676 iph->ihl = 5;
2677 iph->version = 4;
2678 iph->ttl = 32;
2679 iph->tos = pkt_dev->tos;
2680 iph->protocol = IPPROTO_UDP; /* UDP */
2681 iph->saddr = pkt_dev->cur_saddr;
2682 iph->daddr = pkt_dev->cur_daddr;
2683 iph->id = htons(pkt_dev->ip_id);
2684 pkt_dev->ip_id++;
2685 iph->frag_off = 0;
2686 iplen = 20 + 8 + datalen;
2687 iph->tot_len = htons(iplen);
2688 iph->check = 0;
2689 iph->check = ip_fast_csum((void *)iph, iph->ihl);
2690 skb->protocol = protocol;
2691 skb->mac_header = (skb->network_header - ETH_HLEN -
2692 pkt_dev->pkt_overhead);
2693 skb->dev = odev;
2694 skb->pkt_type = PACKET_HOST;
2695
2696 if (pkt_dev->nfrags <= 0) {
2697 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
2698 memset(pgh + 1, 0, datalen - sizeof(struct pktgen_hdr));
2699 } else {
2700 int frags = pkt_dev->nfrags;
2701 int i, len;
2702
2703 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
2704
2705 if (frags > MAX_SKB_FRAGS)
2706 frags = MAX_SKB_FRAGS;
2707 if (datalen > frags * PAGE_SIZE) {
2708 len = datalen - frags * PAGE_SIZE;
2709 memset(skb_put(skb, len), 0, len);
2710 datalen = frags * PAGE_SIZE;
2711 }
2712
2713 i = 0;
2714 while (datalen > 0) {
2715 struct page *page = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);
2716 skb_shinfo(skb)->frags[i].page = page;
2717 skb_shinfo(skb)->frags[i].page_offset = 0;
2718 skb_shinfo(skb)->frags[i].size =
2719 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
2720 datalen -= skb_shinfo(skb)->frags[i].size;
2721 skb->len += skb_shinfo(skb)->frags[i].size;
2722 skb->data_len += skb_shinfo(skb)->frags[i].size;
2723 i++;
2724 skb_shinfo(skb)->nr_frags = i;
2725 }
2726
2727 while (i < frags) {
2728 int rem;
2729
2730 if (i == 0)
2731 break;
2732
2733 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
2734 if (rem == 0)
2735 break;
2736
2737 skb_shinfo(skb)->frags[i - 1].size -= rem;
2738
2739 skb_shinfo(skb)->frags[i] =
2740 skb_shinfo(skb)->frags[i - 1];
2741 get_page(skb_shinfo(skb)->frags[i].page);
2742 skb_shinfo(skb)->frags[i].page =
2743 skb_shinfo(skb)->frags[i - 1].page;
2744 skb_shinfo(skb)->frags[i].page_offset +=
2745 skb_shinfo(skb)->frags[i - 1].size;
2746 skb_shinfo(skb)->frags[i].size = rem;
2747 i++;
2748 skb_shinfo(skb)->nr_frags = i;
2749 }
2750 }
2751
2752 /* Stamp the time, and sequence number,
2753 * convert them to network byte order
2754 */
2755 if (pgh) {
2756 struct timeval timestamp;
2757
2758 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
2759 pgh->seq_num = htonl(pkt_dev->seq_num);
2760
2761 do_gettimeofday(&timestamp);
2762 pgh->tv_sec = htonl(timestamp.tv_sec);
2763 pgh->tv_usec = htonl(timestamp.tv_usec);
2764 }
2765
2766 #ifdef CONFIG_XFRM
2767 if (!process_ipsec(pkt_dev, skb, protocol))
2768 return NULL;
2769 #endif
2770
2771 return skb;
2772 }
2773
2774 /*
2775 * scan_ip6, fmt_ip taken from dietlibc-0.21
2776 * Author Felix von Leitner <felix-dietlibc@fefe.de>
2777 *
2778 * Slightly modified for kernel.
2779 * Should be candidate for net/ipv4/utils.c
2780 * --ro
2781 */
2782
2783 static unsigned int scan_ip6(const char *s, char ip[16])
2784 {
2785 unsigned int i;
2786 unsigned int len = 0;
2787 unsigned long u;
2788 char suffix[16];
2789 unsigned int prefixlen = 0;
2790 unsigned int suffixlen = 0;
2791 __be32 tmp;
2792 char *pos;
2793
2794 for (i = 0; i < 16; i++)
2795 ip[i] = 0;
2796
2797 for (;;) {
2798 if (*s == ':') {
2799 len++;
2800 if (s[1] == ':') { /* Found "::", skip to part 2 */
2801 s += 2;
2802 len++;
2803 break;
2804 }
2805 s++;
2806 }
2807
2808 u = simple_strtoul(s, &pos, 16);
2809 i = pos - s;
2810 if (!i)
2811 return 0;
2812 if (prefixlen == 12 && s[i] == '.') {
2813
2814 /* the last 4 bytes may be written as IPv4 address */
2815
2816 tmp = in_aton(s);
2817 memcpy((struct in_addr *)(ip + 12), &tmp, sizeof(tmp));
2818 return i + len;
2819 }
2820 ip[prefixlen++] = (u >> 8);
2821 ip[prefixlen++] = (u & 255);
2822 s += i;
2823 len += i;
2824 if (prefixlen == 16)
2825 return len;
2826 }
2827
2828 /* part 2, after "::" */
2829 for (;;) {
2830 if (*s == ':') {
2831 if (suffixlen == 0)
2832 break;
2833 s++;
2834 len++;
2835 } else if (suffixlen != 0)
2836 break;
2837
2838 u = simple_strtol(s, &pos, 16);
2839 i = pos - s;
2840 if (!i) {
2841 if (*s)
2842 len--;
2843 break;
2844 }
2845 if (suffixlen + prefixlen <= 12 && s[i] == '.') {
2846 tmp = in_aton(s);
2847 memcpy((struct in_addr *)(suffix + suffixlen), &tmp,
2848 sizeof(tmp));
2849 suffixlen += 4;
2850 len += strlen(s);
2851 break;
2852 }
2853 suffix[suffixlen++] = (u >> 8);
2854 suffix[suffixlen++] = (u & 255);
2855 s += i;
2856 len += i;
2857 if (prefixlen + suffixlen == 16)
2858 break;
2859 }
2860 for (i = 0; i < suffixlen; i++)
2861 ip[16 - suffixlen + i] = suffix[i];
2862 return len;
2863 }
2864
2865 static char tohex(char hexdigit)
2866 {
2867 return hexdigit > 9 ? hexdigit + 'a' - 10 : hexdigit + '0';
2868 }
2869
2870 static int fmt_xlong(char *s, unsigned int i)
2871 {
2872 char *bak = s;
2873 *s = tohex((i >> 12) & 0xf);
2874 if (s != bak || *s != '0')
2875 ++s;
2876 *s = tohex((i >> 8) & 0xf);
2877 if (s != bak || *s != '0')
2878 ++s;
2879 *s = tohex((i >> 4) & 0xf);
2880 if (s != bak || *s != '0')
2881 ++s;
2882 *s = tohex(i & 0xf);
2883 return s - bak + 1;
2884 }
2885
2886 static unsigned int fmt_ip6(char *s, const char ip[16])
2887 {
2888 unsigned int len;
2889 unsigned int i;
2890 unsigned int temp;
2891 unsigned int compressing;
2892 int j;
2893
2894 len = 0;
2895 compressing = 0;
2896 for (j = 0; j < 16; j += 2) {
2897
2898 #ifdef V4MAPPEDPREFIX
2899 if (j == 12 && !memcmp(ip, V4mappedprefix, 12)) {
2900 inet_ntoa_r(*(struct in_addr *)(ip + 12), s);
2901 temp = strlen(s);
2902 return len + temp;
2903 }
2904 #endif
2905 temp = ((unsigned long)(unsigned char)ip[j] << 8) +
2906 (unsigned long)(unsigned char)ip[j + 1];
2907 if (temp == 0) {
2908 if (!compressing) {
2909 compressing = 1;
2910 if (j == 0) {
2911 *s++ = ':';
2912 ++len;
2913 }
2914 }
2915 } else {
2916 if (compressing) {
2917 compressing = 0;
2918 *s++ = ':';
2919 ++len;
2920 }
2921 i = fmt_xlong(s, temp);
2922 len += i;
2923 s += i;
2924 if (j < 14) {
2925 *s++ = ':';
2926 ++len;
2927 }
2928 }
2929 }
2930 if (compressing) {
2931 *s++ = ':';
2932 ++len;
2933 }
2934 *s = 0;
2935 return len;
2936 }
2937
2938 static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
2939 struct pktgen_dev *pkt_dev)
2940 {
2941 struct sk_buff *skb = NULL;
2942 __u8 *eth;
2943 struct udphdr *udph;
2944 int datalen;
2945 struct ipv6hdr *iph;
2946 struct pktgen_hdr *pgh = NULL;
2947 __be16 protocol = htons(ETH_P_IPV6);
2948 __be32 *mpls;
2949 __be16 *vlan_tci = NULL; /* Encapsulates priority and VLAN ID */
2950 __be16 *vlan_encapsulated_proto = NULL; /* packet type ID field (or len) for VLAN tag */
2951 __be16 *svlan_tci = NULL; /* Encapsulates priority and SVLAN ID */
2952 __be16 *svlan_encapsulated_proto = NULL; /* packet type ID field (or len) for SVLAN tag */
2953 u16 queue_map;
2954
2955 if (pkt_dev->nr_labels)
2956 protocol = htons(ETH_P_MPLS_UC);
2957
2958 if (pkt_dev->vlan_id != 0xffff)
2959 protocol = htons(ETH_P_8021Q);
2960
2961 /* Update any of the values, used when we're incrementing various
2962 * fields.
2963 */
2964 queue_map = pkt_dev->cur_queue_map;
2965 mod_cur_headers(pkt_dev);
2966
2967 skb = __netdev_alloc_skb(odev,
2968 pkt_dev->cur_pkt_size + 64
2969 + 16 + pkt_dev->pkt_overhead, GFP_NOWAIT);
2970 if (!skb) {
2971 sprintf(pkt_dev->result, "No memory");
2972 return NULL;
2973 }
2974
2975 skb_reserve(skb, 16);
2976
2977 /* Reserve for ethernet and IP header */
2978 eth = (__u8 *) skb_push(skb, 14);
2979 mpls = (__be32 *)skb_put(skb, pkt_dev->nr_labels*sizeof(__u32));
2980 if (pkt_dev->nr_labels)
2981 mpls_push(mpls, pkt_dev);
2982
2983 if (pkt_dev->vlan_id != 0xffff) {
2984 if (pkt_dev->svlan_id != 0xffff) {
2985 svlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2986 *svlan_tci = build_tci(pkt_dev->svlan_id,
2987 pkt_dev->svlan_cfi,
2988 pkt_dev->svlan_p);
2989 svlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2990 *svlan_encapsulated_proto = htons(ETH_P_8021Q);
2991 }
2992 vlan_tci = (__be16 *)skb_put(skb, sizeof(__be16));
2993 *vlan_tci = build_tci(pkt_dev->vlan_id,
2994 pkt_dev->vlan_cfi,
2995 pkt_dev->vlan_p);
2996 vlan_encapsulated_proto = (__be16 *)skb_put(skb, sizeof(__be16));
2997 *vlan_encapsulated_proto = htons(ETH_P_IPV6);
2998 }
2999
3000 skb->network_header = skb->tail;
3001 skb->transport_header = skb->network_header + sizeof(struct ipv6hdr);
3002 skb_put(skb, sizeof(struct ipv6hdr) + sizeof(struct udphdr));
3003 skb_set_queue_mapping(skb, queue_map);
3004 iph = ipv6_hdr(skb);
3005 udph = udp_hdr(skb);
3006
3007 memcpy(eth, pkt_dev->hh, 12);
3008 *(__be16 *) &eth[12] = protocol;
3009
3010 /* Eth + IPh + UDPh + mpls */
3011 datalen = pkt_dev->cur_pkt_size - 14 -
3012 sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
3013 pkt_dev->pkt_overhead;
3014
3015 if (datalen < sizeof(struct pktgen_hdr)) {
3016 datalen = sizeof(struct pktgen_hdr);
3017 if (net_ratelimit())
3018 printk(KERN_INFO "pktgen: increased datalen to %d\n",
3019 datalen);
3020 }
3021
3022 udph->source = htons(pkt_dev->cur_udp_src);
3023 udph->dest = htons(pkt_dev->cur_udp_dst);
3024 udph->len = htons(datalen + sizeof(struct udphdr));
3025 udph->check = 0; /* No checksum */
3026
3027 *(__be32 *) iph = htonl(0x60000000); /* Version + flow */
3028
3029 if (pkt_dev->traffic_class) {
3030 /* Version + traffic class + flow (0) */
3031 *(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
3032 }
3033
3034 iph->hop_limit = 32;
3035
3036 iph->payload_len = htons(sizeof(struct udphdr) + datalen);
3037 iph->nexthdr = IPPROTO_UDP;
3038
3039 ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
3040 ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
3041
3042 skb->mac_header = (skb->network_header - ETH_HLEN -
3043 pkt_dev->pkt_overhead);
3044 skb->protocol = protocol;
3045 skb->dev = odev;
3046 skb->pkt_type = PACKET_HOST;
3047
3048 if (pkt_dev->nfrags <= 0)
3049 pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
3050 else {
3051 int frags = pkt_dev->nfrags;
3052 int i;
3053
3054 pgh = (struct pktgen_hdr *)(((char *)(udph)) + 8);
3055
3056 if (frags > MAX_SKB_FRAGS)
3057 frags = MAX_SKB_FRAGS;
3058 if (datalen > frags * PAGE_SIZE) {
3059 skb_put(skb, datalen - frags * PAGE_SIZE);
3060 datalen = frags * PAGE_SIZE;
3061 }
3062
3063 i = 0;
3064 while (datalen > 0) {
3065 struct page *page = alloc_pages(GFP_KERNEL, 0);
3066 skb_shinfo(skb)->frags[i].page = page;
3067 skb_shinfo(skb)->frags[i].page_offset = 0;
3068 skb_shinfo(skb)->frags[i].size =
3069 (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
3070 datalen -= skb_shinfo(skb)->frags[i].size;
3071 skb->len += skb_shinfo(skb)->frags[i].size;
3072 skb->data_len += skb_shinfo(skb)->frags[i].size;
3073 i++;
3074 skb_shinfo(skb)->nr_frags = i;
3075 }
3076
3077 while (i < frags) {
3078 int rem;
3079
3080 if (i == 0)
3081 break;
3082
3083 rem = skb_shinfo(skb)->frags[i - 1].size / 2;
3084 if (rem == 0)
3085 break;
3086
3087 skb_shinfo(skb)->frags[i - 1].size -= rem;
3088
3089 skb_shinfo(skb)->frags[i] =
3090 skb_shinfo(skb)->frags[i - 1];
3091 get_page(skb_shinfo(skb)->frags[i].page);
3092 skb_shinfo(skb)->frags[i].page =
3093 skb_shinfo(skb)->frags[i - 1].page;
3094 skb_shinfo(skb)->frags[i].page_offset +=
3095 skb_shinfo(skb)->frags[i - 1].size;
3096 skb_shinfo(skb)->frags[i].size = rem;
3097 i++;
3098 skb_shinfo(skb)->nr_frags = i;
3099 }
3100 }
3101
3102 /* Stamp the time, and sequence number,
3103 * convert them to network byte order
3104 * should we update cloned packets too ?
3105 */
3106 if (pgh) {
3107 struct timeval timestamp;
3108
3109 pgh->pgh_magic = htonl(PKTGEN_MAGIC);
3110 pgh->seq_num = htonl(pkt_dev->seq_num);
3111
3112 do_gettimeofday(&timestamp);
3113 pgh->tv_sec = htonl(timestamp.tv_sec);
3114 pgh->tv_usec = htonl(timestamp.tv_usec);
3115 }
3116 /* pkt_dev->seq_num++; FF: you really mean this? */
3117
3118 return skb;
3119 }
3120
3121 static struct sk_buff *fill_packet(struct net_device *odev,
3122 struct pktgen_dev *pkt_dev)
3123 {
3124 if (pkt_dev->flags & F_IPV6)
3125 return fill_packet_ipv6(odev, pkt_dev);
3126 else
3127 return fill_packet_ipv4(odev, pkt_dev);
3128 }
3129
3130 static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
3131 {
3132 pkt_dev->seq_num = 1;
3133 pkt_dev->idle_acc = 0;
3134 pkt_dev->sofar = 0;
3135 pkt_dev->tx_bytes = 0;
3136 pkt_dev->errors = 0;
3137 }
3138
3139 /* Set up structure for sending pkts, clear counters */
3140
3141 static void pktgen_run(struct pktgen_thread *t)
3142 {
3143 struct pktgen_dev *pkt_dev;
3144 int started = 0;
3145
3146 pr_debug("pktgen: entering pktgen_run. %p\n", t);
3147
3148 if_lock(t);
3149 list_for_each_entry(pkt_dev, &t->if_list, list) {
3150
3151 /*
3152 * setup odev and create initial packet.
3153 */
3154 pktgen_setup_inject(pkt_dev);
3155
3156 if (pkt_dev->odev) {
3157 pktgen_clear_counters(pkt_dev);
3158 pkt_dev->running = 1; /* Cranke yeself! */
3159 pkt_dev->skb = NULL;
3160 pkt_dev->started_at =
3161 pkt_dev->next_tx = ktime_now();
3162
3163 set_pkt_overhead(pkt_dev);
3164
3165 strcpy(pkt_dev->result, "Starting");
3166 started++;
3167 } else
3168 strcpy(pkt_dev->result, "Error starting");
3169 }
3170 if_unlock(t);
3171 if (started)
3172 t->control &= ~(T_STOP);
3173 }
3174
3175 static void pktgen_stop_all_threads_ifs(void)
3176 {
3177 struct pktgen_thread *t;
3178
3179 pr_debug("pktgen: entering pktgen_stop_all_threads_ifs.\n");
3180
3181 mutex_lock(&pktgen_thread_lock);
3182
3183 list_for_each_entry(t, &pktgen_threads, th_list)
3184 t->control |= T_STOP;
3185
3186 mutex_unlock(&pktgen_thread_lock);
3187 }
3188
3189 static int thread_is_running(const struct pktgen_thread *t)
3190 {
3191 const struct pktgen_dev *pkt_dev;
3192
3193 list_for_each_entry(pkt_dev, &t->if_list, list)
3194 if (pkt_dev->running)
3195 return 1;
3196 return 0;
3197 }
3198
3199 static int pktgen_wait_thread_run(struct pktgen_thread *t)
3200 {
3201 if_lock(t);
3202
3203 while (thread_is_running(t)) {
3204
3205 if_unlock(t);
3206
3207 msleep_interruptible(100);
3208
3209 if (signal_pending(current))
3210 goto signal;
3211 if_lock(t);
3212 }
3213 if_unlock(t);
3214 return 1;
3215 signal:
3216 return 0;
3217 }
3218
3219 static int pktgen_wait_all_threads_run(void)
3220 {
3221 struct pktgen_thread *t;
3222 int sig = 1;
3223
3224 mutex_lock(&pktgen_thread_lock);
3225
3226 list_for_each_entry(t, &pktgen_threads, th_list) {
3227 sig = pktgen_wait_thread_run(t);
3228 if (sig == 0)
3229 break;
3230 }
3231
3232 if (sig == 0)
3233 list_for_each_entry(t, &pktgen_threads, th_list)
3234 t->control |= (T_STOP);
3235
3236 mutex_unlock(&pktgen_thread_lock);
3237 return sig;
3238 }
3239
3240 static void pktgen_run_all_threads(void)
3241 {
3242 struct pktgen_thread *t;
3243
3244 pr_debug("pktgen: entering pktgen_run_all_threads.\n");
3245
3246 mutex_lock(&pktgen_thread_lock);
3247
3248 list_for_each_entry(t, &pktgen_threads, th_list)
3249 t->control |= (T_RUN);
3250
3251 mutex_unlock(&pktgen_thread_lock);
3252
3253 /* Propagate thread->control */
3254 schedule_timeout_interruptible(msecs_to_jiffies(125));
3255
3256 pktgen_wait_all_threads_run();
3257 }
3258
3259 static void pktgen_reset_all_threads(void)
3260 {
3261 struct pktgen_thread *t;
3262
3263 pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
3264
3265 mutex_lock(&pktgen_thread_lock);
3266
3267 list_for_each_entry(t, &pktgen_threads, th_list)
3268 t->control |= (T_REMDEVALL);
3269
3270 mutex_unlock(&pktgen_thread_lock);
3271
3272 /* Propagate thread->control */
3273 schedule_timeout_interruptible(msecs_to_jiffies(125));
3274
3275 pktgen_wait_all_threads_run();
3276 }
3277
3278 static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
3279 {
3280 __u64 bps, mbps, pps;
3281 char *p = pkt_dev->result;
3282 ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
3283 pkt_dev->started_at);
3284 ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
3285
3286 p += sprintf(p, "OK: %llu(c%llu+d%llu) nsec, %llu (%dbyte,%dfrags)\n",
3287 (unsigned long long)ktime_to_us(elapsed),
3288 (unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
3289 (unsigned long long)ktime_to_us(idle),
3290 (unsigned long long)pkt_dev->sofar,
3291 pkt_dev->cur_pkt_size, nr_frags);
3292
3293 pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
3294 ktime_to_ns(elapsed));
3295
3296 bps = pps * 8 * pkt_dev->cur_pkt_size;
3297
3298 mbps = bps;
3299 do_div(mbps, 1000000);
3300 p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
3301 (unsigned long long)pps,
3302 (unsigned long long)mbps,
3303 (unsigned long long)bps,
3304 (unsigned long long)pkt_dev->errors);
3305 }
3306
3307 /* Set stopped-at timer, remove from running list, do counters & statistics */
3308 static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
3309 {
3310 int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
3311
3312 if (!pkt_dev->running) {
3313 printk(KERN_WARNING "pktgen: interface: %s is already "
3314 "stopped\n", pkt_dev->odevname);
3315 return -EINVAL;
3316 }
3317
3318 kfree_skb(pkt_dev->skb);
3319 pkt_dev->skb = NULL;
3320 pkt_dev->stopped_at = ktime_now();
3321 pkt_dev->running = 0;
3322
3323 show_results(pkt_dev, nr_frags);
3324
3325 return 0;
3326 }
3327
3328 static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
3329 {
3330 struct pktgen_dev *pkt_dev, *best = NULL;
3331
3332 if_lock(t);
3333
3334 list_for_each_entry(pkt_dev, &t->if_list, list) {
3335 if (!pkt_dev->running)
3336 continue;
3337 if (best == NULL)
3338 best = pkt_dev;
3339 else if (ktime_lt(pkt_dev->next_tx, best->next_tx))
3340 best = pkt_dev;
3341 }
3342 if_unlock(t);
3343 return best;
3344 }
3345
3346 static void pktgen_stop(struct pktgen_thread *t)
3347 {
3348 struct pktgen_dev *pkt_dev;
3349
3350 pr_debug("pktgen: entering pktgen_stop\n");
3351
3352 if_lock(t);
3353
3354 list_for_each_entry(pkt_dev, &t->if_list, list) {
3355 pktgen_stop_device(pkt_dev);
3356 }
3357
3358 if_unlock(t);
3359 }
3360
3361 /*
3362 * one of our devices needs to be removed - find it
3363 * and remove it
3364 */
3365 static void pktgen_rem_one_if(struct pktgen_thread *t)
3366 {
3367 struct list_head *q, *n;
3368 struct pktgen_dev *cur;
3369
3370 pr_debug("pktgen: entering pktgen_rem_one_if\n");
3371
3372 if_lock(t);
3373
3374 list_for_each_safe(q, n, &t->if_list) {
3375 cur = list_entry(q, struct pktgen_dev, list);
3376
3377 if (!cur->removal_mark)
3378 continue;
3379
3380 kfree_skb(cur->skb);
3381 cur->skb = NULL;
3382
3383 pktgen_remove_device(t, cur);
3384
3385 break;
3386 }
3387
3388 if_unlock(t);
3389 }
3390
3391 static void pktgen_rem_all_ifs(struct pktgen_thread *t)
3392 {
3393 struct list_head *q, *n;
3394 struct pktgen_dev *cur;
3395
3396 /* Remove all devices, free mem */
3397
3398 pr_debug("pktgen: entering pktgen_rem_all_ifs\n");
3399 if_lock(t);
3400
3401 list_for_each_safe(q, n, &t->if_list) {
3402 cur = list_entry(q, struct pktgen_dev, list);
3403
3404 kfree_skb(cur->skb);
3405 cur->skb = NULL;
3406
3407 pktgen_remove_device(t, cur);
3408 }
3409
3410 if_unlock(t);
3411 }
3412
3413 static void pktgen_rem_thread(struct pktgen_thread *t)
3414 {
3415 /* Remove from the thread list */
3416
3417 remove_proc_entry(t->tsk->comm, pg_proc_dir);
3418
3419 mutex_lock(&pktgen_thread_lock);
3420
3421 list_del(&t->th_list);
3422
3423 mutex_unlock(&pktgen_thread_lock);
3424 }
3425
3426 static void pktgen_resched(struct pktgen_dev *pkt_dev)
3427 {
3428 ktime_t idle_start = ktime_now();
3429 schedule();
3430 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3431 }
3432
3433 static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
3434 {
3435 ktime_t idle_start = ktime_now();
3436
3437 while (atomic_read(&(pkt_dev->skb->users)) != 1) {
3438 if (signal_pending(current))
3439 break;
3440
3441 if (need_resched())
3442 pktgen_resched(pkt_dev);
3443 else
3444 cpu_relax();
3445 }
3446 pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_now(), idle_start));
3447 }
3448
3449 static void pktgen_xmit(struct pktgen_dev *pkt_dev)
3450 {
3451 struct net_device *odev = pkt_dev->odev;
3452 netdev_tx_t (*xmit)(struct sk_buff *, struct net_device *)
3453 = odev->netdev_ops->ndo_start_xmit;
3454 struct netdev_queue *txq;
3455 u16 queue_map;
3456 int ret;
3457
3458 /* If device is offline, then don't send */
3459 if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
3460 pktgen_stop_device(pkt_dev);
3461 return;
3462 }
3463
3464 /* This is max DELAY, this has special meaning of
3465 * "never transmit"
3466 */
3467 if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
3468 pkt_dev->next_tx = ktime_add_ns(ktime_now(), ULONG_MAX);
3469 return;
3470 }
3471
3472 /* If no skb or clone count exhausted then get new one */
3473 if (!pkt_dev->skb || (pkt_dev->last_ok &&
3474 ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
3475 /* build a new pkt */
3476 kfree_skb(pkt_dev->skb);
3477
3478 pkt_dev->skb = fill_packet(odev, pkt_dev);
3479 if (pkt_dev->skb == NULL) {
3480 printk(KERN_ERR "pktgen: ERROR: couldn't "
3481 "allocate skb in fill_packet.\n");
3482 schedule();
3483 pkt_dev->clone_count--; /* back out increment, OOM */
3484 return;
3485 }
3486 pkt_dev->last_pkt_size = pkt_dev->skb->len;
3487 pkt_dev->allocated_skbs++;
3488 pkt_dev->clone_count = 0; /* reset counter */
3489 }
3490
3491 if (pkt_dev->delay && pkt_dev->last_ok)
3492 spin(pkt_dev, pkt_dev->next_tx);
3493
3494 queue_map = skb_get_queue_mapping(pkt_dev->skb);
3495 txq = netdev_get_tx_queue(odev, queue_map);
3496
3497 __netif_tx_lock_bh(txq);
3498
3499 if (unlikely(netif_tx_queue_stopped(txq) || netif_tx_queue_frozen(txq))) {
3500 ret = NETDEV_TX_BUSY;
3501 pkt_dev->last_ok = 0;
3502 goto unlock;
3503 }
3504 atomic_inc(&(pkt_dev->skb->users));
3505 ret = (*xmit)(pkt_dev->skb, odev);
3506
3507 switch (ret) {
3508 case NETDEV_TX_OK:
3509 txq_trans_update(txq);
3510 pkt_dev->last_ok = 1;
3511 pkt_dev->sofar++;
3512 pkt_dev->seq_num++;
3513 pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
3514 break;
3515 case NET_XMIT_DROP:
3516 case NET_XMIT_CN:
3517 case NET_XMIT_POLICED:
3518 /* skb has been consumed */
3519 pkt_dev->errors++;
3520 break;
3521 default: /* Drivers are not supposed to return other values! */
3522 if (net_ratelimit())
3523 pr_info("pktgen: %s xmit error: %d\n",
3524 pkt_dev->odevname, ret);
3525 pkt_dev->errors++;
3526 /* fallthru */
3527 case NETDEV_TX_LOCKED:
3528 case NETDEV_TX_BUSY:
3529 /* Retry it next time */
3530 atomic_dec(&(pkt_dev->skb->users));
3531 pkt_dev->last_ok = 0;
3532 }
3533 unlock:
3534 __netif_tx_unlock_bh(txq);
3535
3536 /* If pkt_dev->count is zero, then run forever */
3537 if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
3538 pktgen_wait_for_skb(pkt_dev);
3539
3540 /* Done with this */
3541 pktgen_stop_device(pkt_dev);
3542 }
3543 }
3544
3545 /*
3546 * Main loop of the thread goes here
3547 */
3548
3549 static int pktgen_thread_worker(void *arg)
3550 {
3551 DEFINE_WAIT(wait);
3552 struct pktgen_thread *t = arg;
3553 struct pktgen_dev *pkt_dev = NULL;
3554 int cpu = t->cpu;
3555
3556 BUG_ON(smp_processor_id() != cpu);
3557
3558 init_waitqueue_head(&t->queue);
3559 complete(&t->start_done);
3560
3561 pr_debug("pktgen: starting pktgen/%d: pid=%d\n",
3562 cpu, task_pid_nr(current));
3563
3564 set_current_state(TASK_INTERRUPTIBLE);
3565
3566 set_freezable();
3567
3568 while (!kthread_should_stop()) {
3569 pkt_dev = next_to_run(t);
3570
3571 if (unlikely(!pkt_dev && t->control == 0)) {
3572 wait_event_interruptible_timeout(t->queue,
3573 t->control != 0,
3574 HZ/10);
3575 try_to_freeze();
3576 continue;
3577 }
3578
3579 __set_current_state(TASK_RUNNING);
3580
3581 if (likely(pkt_dev)) {
3582 pktgen_xmit(pkt_dev);
3583
3584 if (need_resched())
3585 pktgen_resched(pkt_dev);
3586 else
3587 cpu_relax();
3588 }
3589
3590 if (t->control & T_STOP) {
3591 pktgen_stop(t);
3592 t->control &= ~(T_STOP);
3593 }
3594
3595 if (t->control & T_RUN) {
3596 pktgen_run(t);
3597 t->control &= ~(T_RUN);
3598 }
3599
3600 if (t->control & T_REMDEVALL) {
3601 pktgen_rem_all_ifs(t);
3602 t->control &= ~(T_REMDEVALL);
3603 }
3604
3605 if (t->control & T_REMDEV) {
3606 pktgen_rem_one_if(t);
3607 t->control &= ~(T_REMDEV);
3608 }
3609
3610 try_to_freeze();
3611
3612 set_current_state(TASK_INTERRUPTIBLE);
3613 }
3614
3615 pr_debug("pktgen: %s stopping all device\n", t->tsk->comm);
3616 pktgen_stop(t);
3617
3618 pr_debug("pktgen: %s removing all device\n", t->tsk->comm);
3619 pktgen_rem_all_ifs(t);
3620
3621 pr_debug("pktgen: %s removing thread.\n", t->tsk->comm);
3622 pktgen_rem_thread(t);
3623
3624 return 0;
3625 }
3626
3627 static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
3628 const char *ifname, bool exact)
3629 {
3630 struct pktgen_dev *p, *pkt_dev = NULL;
3631 size_t len = strlen(ifname);
3632
3633 if_lock(t);
3634 list_for_each_entry(p, &t->if_list, list)
3635 if (strncmp(p->odevname, ifname, len) == 0) {
3636 if (p->odevname[len]) {
3637 if (exact || p->odevname[len] != '@')
3638 continue;
3639 }
3640 pkt_dev = p;
3641 break;
3642 }
3643
3644 if_unlock(t);
3645 pr_debug("pktgen: find_dev(%s) returning %p\n", ifname, pkt_dev);
3646 return pkt_dev;
3647 }
3648
3649 /*
3650 * Adds a dev at front of if_list.
3651 */
3652
3653 static int add_dev_to_thread(struct pktgen_thread *t,
3654 struct pktgen_dev *pkt_dev)
3655 {
3656 int rv = 0;
3657
3658 if_lock(t);
3659
3660 if (pkt_dev->pg_thread) {
3661 printk(KERN_ERR "pktgen: ERROR: already assigned "
3662 "to a thread.\n");
3663 rv = -EBUSY;
3664 goto out;
3665 }
3666
3667 list_add(&pkt_dev->list, &t->if_list);
3668 pkt_dev->pg_thread = t;
3669 pkt_dev->running = 0;
3670
3671 out:
3672 if_unlock(t);
3673 return rv;
3674 }
3675
3676 /* Called under thread lock */
3677
3678 static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
3679 {
3680 struct pktgen_dev *pkt_dev;
3681 int err;
3682 int node = cpu_to_node(t->cpu);
3683
3684 /* We don't allow a device to be on several threads */
3685
3686 pkt_dev = __pktgen_NN_threads(ifname, FIND);
3687 if (pkt_dev) {
3688 printk(KERN_ERR "pktgen: ERROR: interface already used.\n");
3689 return -EBUSY;
3690 }
3691
3692 pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
3693 if (!pkt_dev)
3694 return -ENOMEM;
3695
3696 strcpy(pkt_dev->odevname, ifname);
3697 pkt_dev->flows = vmalloc_node(MAX_CFLOWS * sizeof(struct flow_state),
3698 node);
3699 if (pkt_dev->flows == NULL) {
3700 kfree(pkt_dev);
3701 return -ENOMEM;
3702 }
3703 memset(pkt_dev->flows, 0, MAX_CFLOWS * sizeof(struct flow_state));
3704
3705 pkt_dev->removal_mark = 0;
3706 pkt_dev->min_pkt_size = ETH_ZLEN;
3707 pkt_dev->max_pkt_size = ETH_ZLEN;
3708 pkt_dev->nfrags = 0;
3709 pkt_dev->clone_skb = pg_clone_skb_d;
3710 pkt_dev->delay = pg_delay_d;
3711 pkt_dev->count = pg_count_d;
3712 pkt_dev->sofar = 0;
3713 pkt_dev->udp_src_min = 9; /* sink port */
3714 pkt_dev->udp_src_max = 9;
3715 pkt_dev->udp_dst_min = 9;
3716 pkt_dev->udp_dst_max = 9;
3717
3718 pkt_dev->vlan_p = 0;
3719 pkt_dev->vlan_cfi = 0;
3720 pkt_dev->vlan_id = 0xffff;
3721 pkt_dev->svlan_p = 0;
3722 pkt_dev->svlan_cfi = 0;
3723 pkt_dev->svlan_id = 0xffff;
3724 pkt_dev->node = -1;
3725
3726 err = pktgen_setup_dev(pkt_dev, ifname);
3727 if (err)
3728 goto out1;
3729
3730 pkt_dev->entry = proc_create_data(ifname, 0600, pg_proc_dir,
3731 &pktgen_if_fops, pkt_dev);
3732 if (!pkt_dev->entry) {
3733 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3734 PG_PROC_DIR, ifname);
3735 err = -EINVAL;
3736 goto out2;
3737 }
3738 #ifdef CONFIG_XFRM
3739 pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
3740 pkt_dev->ipsproto = IPPROTO_ESP;
3741 #endif
3742
3743 return add_dev_to_thread(t, pkt_dev);
3744 out2:
3745 dev_put(pkt_dev->odev);
3746 out1:
3747 #ifdef CONFIG_XFRM
3748 free_SAs(pkt_dev);
3749 #endif
3750 vfree(pkt_dev->flows);
3751 kfree(pkt_dev);
3752 return err;
3753 }
3754
3755 static int __init pktgen_create_thread(int cpu)
3756 {
3757 struct pktgen_thread *t;
3758 struct proc_dir_entry *pe;
3759 struct task_struct *p;
3760
3761 t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
3762 cpu_to_node(cpu));
3763 if (!t) {
3764 printk(KERN_ERR "pktgen: ERROR: out of memory, can't "
3765 "create new thread.\n");
3766 return -ENOMEM;
3767 }
3768
3769 spin_lock_init(&t->if_lock);
3770 t->cpu = cpu;
3771
3772 INIT_LIST_HEAD(&t->if_list);
3773
3774 list_add_tail(&t->th_list, &pktgen_threads);
3775 init_completion(&t->start_done);
3776
3777 p = kthread_create(pktgen_thread_worker, t, "kpktgend_%d", cpu);
3778 if (IS_ERR(p)) {
3779 printk(KERN_ERR "pktgen: kernel_thread() failed "
3780 "for cpu %d\n", t->cpu);
3781 list_del(&t->th_list);
3782 kfree(t);
3783 return PTR_ERR(p);
3784 }
3785 kthread_bind(p, cpu);
3786 t->tsk = p;
3787
3788 pe = proc_create_data(t->tsk->comm, 0600, pg_proc_dir,
3789 &pktgen_thread_fops, t);
3790 if (!pe) {
3791 printk(KERN_ERR "pktgen: cannot create %s/%s procfs entry.\n",
3792 PG_PROC_DIR, t->tsk->comm);
3793 kthread_stop(p);
3794 list_del(&t->th_list);
3795 kfree(t);
3796 return -EINVAL;
3797 }
3798
3799 wake_up_process(p);
3800 wait_for_completion(&t->start_done);
3801
3802 return 0;
3803 }
3804
3805 /*
3806 * Removes a device from the thread if_list.
3807 */
3808 static void _rem_dev_from_if_list(struct pktgen_thread *t,
3809 struct pktgen_dev *pkt_dev)
3810 {
3811 struct list_head *q, *n;
3812 struct pktgen_dev *p;
3813
3814 list_for_each_safe(q, n, &t->if_list) {
3815 p = list_entry(q, struct pktgen_dev, list);
3816 if (p == pkt_dev)
3817 list_del(&p->list);
3818 }
3819 }
3820
3821 static int pktgen_remove_device(struct pktgen_thread *t,
3822 struct pktgen_dev *pkt_dev)
3823 {
3824
3825 pr_debug("pktgen: remove_device pkt_dev=%p\n", pkt_dev);
3826
3827 if (pkt_dev->running) {
3828 printk(KERN_WARNING "pktgen: WARNING: trying to remove a "
3829 "running interface, stopping it now.\n");
3830 pktgen_stop_device(pkt_dev);
3831 }
3832
3833 /* Dis-associate from the interface */
3834
3835 if (pkt_dev->odev) {
3836 dev_put(pkt_dev->odev);
3837 pkt_dev->odev = NULL;
3838 }
3839
3840 /* And update the thread if_list */
3841
3842 _rem_dev_from_if_list(t, pkt_dev);
3843
3844 if (pkt_dev->entry)
3845 remove_proc_entry(pkt_dev->entry->name, pg_proc_dir);
3846
3847 #ifdef CONFIG_XFRM
3848 free_SAs(pkt_dev);
3849 #endif
3850 vfree(pkt_dev->flows);
3851 kfree(pkt_dev);
3852 return 0;
3853 }
3854
3855 static int __init pg_init(void)
3856 {
3857 int cpu;
3858 struct proc_dir_entry *pe;
3859
3860 printk(KERN_INFO "%s", version);
3861
3862 pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
3863 if (!pg_proc_dir)
3864 return -ENODEV;
3865
3866 pe = proc_create(PGCTRL, 0600, pg_proc_dir, &pktgen_fops);
3867 if (pe == NULL) {
3868 printk(KERN_ERR "pktgen: ERROR: cannot create %s "
3869 "procfs entry.\n", PGCTRL);
3870 proc_net_remove(&init_net, PG_PROC_DIR);
3871 return -EINVAL;
3872 }
3873
3874 /* Register us to receive netdevice events */
3875 register_netdevice_notifier(&pktgen_notifier_block);
3876
3877 for_each_online_cpu(cpu) {
3878 int err;
3879
3880 err = pktgen_create_thread(cpu);
3881 if (err)
3882 printk(KERN_WARNING "pktgen: WARNING: Cannot create "
3883 "thread for cpu %d (%d)\n", cpu, err);
3884 }
3885
3886 if (list_empty(&pktgen_threads)) {
3887 printk(KERN_ERR "pktgen: ERROR: Initialization failed for "
3888 "all threads\n");
3889 unregister_netdevice_notifier(&pktgen_notifier_block);
3890 remove_proc_entry(PGCTRL, pg_proc_dir);
3891 proc_net_remove(&init_net, PG_PROC_DIR);
3892 return -ENODEV;
3893 }
3894
3895 return 0;
3896 }
3897
3898 static void __exit pg_cleanup(void)
3899 {
3900 struct pktgen_thread *t;
3901 struct list_head *q, *n;
3902 wait_queue_head_t queue;
3903 init_waitqueue_head(&queue);
3904
3905 /* Stop all interfaces & threads */
3906
3907 list_for_each_safe(q, n, &pktgen_threads) {
3908 t = list_entry(q, struct pktgen_thread, th_list);
3909 kthread_stop(t->tsk);
3910 kfree(t);
3911 }
3912
3913 /* Un-register us from receiving netdevice events */
3914 unregister_netdevice_notifier(&pktgen_notifier_block);
3915
3916 /* Clean up proc file system */
3917 remove_proc_entry(PGCTRL, pg_proc_dir);
3918 proc_net_remove(&init_net, PG_PROC_DIR);
3919 }
3920
3921 module_init(pg_init);
3922 module_exit(pg_cleanup);
3923
3924 MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
3925 MODULE_DESCRIPTION("Packet Generator tool");
3926 MODULE_LICENSE("GPL");
3927 MODULE_VERSION(VERSION);
3928 module_param(pg_count_d, int, 0);
3929 MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
3930 module_param(pg_delay_d, int, 0);
3931 MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
3932 module_param(pg_clone_skb_d, int, 0);
3933 MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
3934 module_param(debug, int, 0);
3935 MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
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